I don't know the options, but if more then one lizards live in grass and have similar characteristics then I do believe it would "Adaptation" since they are adapting to live in that environment... my apologies if I am incorrect Hope this helps!!!!
Explanation: Members of the same species do not have the same number of cells. Think differences in height or weight. They do not have identical traits. Think siblings. They cannot create different species. Two wolves cannot make a coyote.
