(b) the daily amount of calories that a rat eats increases steadily from birth to about age 3 months. then…

(b) the daily amount of calories that a rat eats increases steadily from birth to about age 3 months. then, the amount levels off until about age 6 months, when it increases again.

(b) the daily amount of calories that a rat eats increases steadily from birth to about age 3 months. then, the amount levels off until about age 6 months, when it increases again.

Answer

Explanation:

Step1: Analyze the description

The daily calorie - intake of a rat increases steadily from birth to 3 months, then levels off until 6 months and then increases again.

Step2: Match with graphs

The first graph has a continuous increase without a leveling - off period. The second graph has a decrease and then an increase which is not in line with the description. The third graph has a decrease after the leveling - off period which is incorrect. The fourth graph shows an initial increase, then a horizontal (leveling - off) part and then another increase which matches the description.

Answer:

The fourth graph (the one with an initial increase, a horizontal section, and then another increase)