Question

which of the following describes a factor that would reduce the carrying capacity of amoebas inhabiting a lake?
warming of waters due to global warming
increase in the size of the lake due to changing land use
less competition due to the introduction of a nonnative plant species
reduction of aquatic plants living in the lake due to destruction by humans

Explanation:

Carrying capacity is the maximum population size of a species that an environment can sustain. Warming waters can change water - quality and temperature - sensitive processes for amoebas. An increase in lake size would likely increase carrying capacity. Less competition would also increase it. However, a reduction of aquatic plants due to human destruction reduces food sources and habitat complexity for amoebas, thus reducing carrying capacity.

Answer:

reduction of aquatic plants living in the lake due to destruction by humans