In a population of lizards, we see the frequency of the allele that calls for green pigmentation increase from 50%, to 75%, and then 90% in three generations. Why might this be?

1. glaciers are melting

2. more water going into ocean (water's such as fresh waters, etc)

thinking it would be d not too sure but i think it's right

satellites are frequently used to make observations of the orbit on earth

answer; coat color for blending in with dry grass;