Which change would most likely cause a decrease in the number of squirrels living in and area

Migration of squirrels.

Explanation:

Migration of squirrels can cause decrease in population in an area.

Squirrels migrate or move for one place to another which can be as a result of drought, food shortage or overpopulation.

Squirrels tend to migrate from an area to another in search of food for living. They also move when there is drought to get water and when their population in an area much, the migrate to get another space.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.