Concept:Darwin’s theory of natural selection assumes limited resources, not abundance.
Explanation:Natural selection occurs because organisms produce more offspring than the environment can support.
This leads to fierce competition for survival among the offspring.
Nature then selects those individuals best suited to survive and reproduce.
Weaker or less adapted offspring are eliminated in this struggle.
However, for natural selection to operate, food and other resources must be limited, not abundant.
Abundant resources would reduce competition and weaken the selection process.
Therefore, the condition that Darwin did NOT propose is that food and other needs are abundant.
Answer:D. food and other needs are abundant