Until the captive population had reached a target size biologist limited the number of tamarins that were reintroduced into the wild

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

c. live where it’s cold and icy

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.