which environmental factor could lead to a decrease in genetic variation in a population of tuna?\n an…

which environmental factor could lead to a decrease in genetic variation in a population of tuna?\n an increase in food availability\n an increase in pollution\n a decrease in tuna fishing\n a decrease in tuna predators

which environmental factor could lead to a decrease in genetic variation in a population of tuna?\n an increase in food availability\n an increase in pollution\n a decrease in tuna fishing\n a decrease in tuna predators

Answer

Brief Explanations:

Pollution can cause high - mortality events in tuna populations. When many individuals die due to pollution - related factors, the genetic diversity of the population decreases as the number of different genotypes is reduced. An increase in food availability, decrease in fishing, and decrease in predators are likely to have positive impacts on the population size and may not directly lead to a decrease in genetic variation.

Answer:

an increase in pollution