Two plants that grow in the same location and require the same resources would most likely compete for the same

The choices are:
a. climax fauna
b. niche
c. biological control
d. population

The answer is b. niche. It would compete in terms of its needs to survive this involves the biotic and abiotic relationship. Factors involve food, water, and shelter. In some cases, it would lead to the extinction of one. However, having different niche can make the organisms live longer. 

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.