read the passage.\ntwo kinds of iron\nthe human body needs iron to produce hemoglobin, a substance that…

read the passage.\ntwo kinds of iron\nthe human body needs iron to produce hemoglobin, a substance that helps red blood cells transport oxygen. without enough iron, a person may feel tired and weak. dietary sources of iron include plant sources, such as vegetables and beans, and animal foods, including poultry, red meat, and fish. however, plant and animal sources are not equal. the iron in plants, called nonheme iron, is not easily absorbed by the human digestive system. for example, a half cup of cooked spinach contains a healthy dose of over three milligrams of iron. unfortunately, only five percent of that iron can be used by the body. on the other hand, the iron in animal foods, called heme iron, is better utilized. heme iron is contained within a ring of protein, which helps the body to absorb it easily.\nwhat is the main, or central, idea of the passage?\nheme iron, found in meat and fish, is easily absorbed by the human body.\nplant and animal food sources both contain iron, but the iron in animal foods is more accessible to the body.\nplant and animal food sources both contain iron, which helps red blood cells carry oxygen throughout the body.

read the passage.\ntwo kinds of iron\nthe human body needs iron to produce hemoglobin, a substance that helps red blood cells transport oxygen. without enough iron, a person may feel tired and weak. dietary sources of iron include plant sources, such as vegetables and beans, and animal foods, including poultry, red meat, and fish. however, plant and animal sources are not equal. the iron in plants, called nonheme iron, is not easily absorbed by the human digestive system. for example, a half cup of cooked spinach contains a healthy dose of over three milligrams of iron. unfortunately, only five percent of that iron can be used by the body. on the other hand, the iron in animal foods, called heme iron, is better utilized. heme iron is contained within a ring of protein, which helps the body to absorb it easily.\nwhat is the main, or central, idea of the passage?\nheme iron, found in meat and fish, is easily absorbed by the human body.\nplant and animal food sources both contain iron, but the iron in animal foods is more accessible to the body.\nplant and animal food sources both contain iron, which helps red blood cells carry oxygen throughout the body.

Answer

Brief Explanations:

The passage first mentions that the human body needs iron and that there are plant and animal sources of iron. Then it focuses on comparing the two types of iron (nonheme iron from plants and heme iron from animals), highlighting that plant - source iron (nonheme) is not easily absorbed while animal - source iron (heme) is better utilized. The first option only focuses on heme iron in meat and fish, which is too narrow. The third option only mentions that both sources contain iron for red blood cells, but does not capture the comparison aspect. The second option correctly summarizes the main idea of the passage which is about the difference in iron absorption between plant and animal food sources.

Answer:

Plant and animal food sources both contain iron, but the iron in animal foods is more accessible to the body.