The hardy-weinberg law describes the characteristics of a genetic population under ideal circumstances. this principle states that gene frequencies in a population, under ideal conditions, would:
a. remain stable over time
b. display directional selection
c. develop zygomatic plasticity

a. remain stable over time

Explanation:

Hardy-Weinberg law -

It states that , if there is no evolutionary influence like the mate choice  ,  population bottleneck , sexual mutation , etc and the conditions are ideal in a population , then the gene and allele  frequencies in that particular population remain constant from generation to generation .

Hence , from the options given in the question , the correct answer is ( a ) remain stable over time .

answer conditional instability;

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.