The graphs here show the distribution of beak depths for the ground finches on Daphne Major, an island in the Galapagos. The bird beaks were measured over a multi-year study, including a time period before and after a drought. The drought reduced the supply of
seeds and left most of the seeds as thick-walled nuts that survived the drought. Analyze the data and select the claim about natural
selection and genetic diversity that is supported by the data.
PS

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms