Which species likely has the smallest population?

the pallid winged grasshopper i think

Explanation:

it seems to have the most predators, also its predators dont seem to be much of prey so they would have larger population.

is this for the e2020 class

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.