Which kind of environmental change would a tomado be? short-term, because it occurs very quickly
O long-term, because it lasts a long time
O short-term, because it affects only a small area
O long-term, because they have been happening for millions of years

Short term

Explanation:

Because it occurs very quickly

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).