Final answer:
Members of a species must share limited resources according to Charles Darwin, which is true and aligns with the principles of natural selection.
Step-by-step explanation:
According to Charles Darwin, members of a species do indeed share limited resources, making statement (b) true. This is a fundamental component of his theory of natural selection. In nature, more offspring are produced than can survive due to limited resources, leading to competition among individuals. Those with favorable traits that increase their chances of survival and reproduction will pass these traits to the next generation. This principle was influenced by Darwin's reading of Thomas Malthus's work on population growth and resource limitation in human populations. The competition for scarce resources, variation among offspring, and inheritance of traits are all crucial aspects leading to the adaptation of populations over time.