The answer is C. High birth rates
High birth rates or overpopulation is one of the most pressing environmental issues today. It silently is the largest contributor to environmental pollution, global warming, loss of habitat for animals as the wild is converted to cities and housing. INtensive farming practices to increase food supply also aggravates the situation. Moreover, the consumption of natural resources and the slow reaction to preserve it endangers life existence.
Antibiotic resistance happens naturally due to genetic mutation through random selection, however, genetic drift occurs on purpose and tests which genes are stronger and should continue to be passed on to future generations. In most cases, genetic drift is needed and antibiotic resistance isn’t.
Ok since you don't have any answers to choose from I would say Functions is the right answer. Usually we're supposed to explain why but I'm not sure how to for this question, sorry.
Synthesis and transport of polypeptides.