Final answer:
The true statement regarding humans according to Fuentes is that humans are closely related to chimpanzees. We share a common ancestor from approximately six million years ago. Chimpanzees are also more closely related to humans than to rhesus monkeys.
Step-by-step explanation:
According to Carlos Fuentes, the true statement about humans among the choices given is c. Humans are closely related to chimpanzees. Humans are not the only species capable of tool use; other animals like otters, chimpanzees, and some birds also use tools. While humans have complex social structures, they are not unique in this aspect as many other species exhibit complex social interactions as well. Lastly, contrary to choice d, humans do have a significant impact on the environment, which is addressed by human ecology theory.
Specifically, when we look at the relationship between chimpanzees and humans, the accurate statement is c. chimpanzees and humans evolved from a common ancestor. This common ancestor lived approximately six million years ago, from which both species diverged. The term 'hominin' refers to species that evolved after this split and are more closely related to humans than to chimpanzees, including Homo habilis and Homo erectus, among others.
Additionally, it is important to note that chimpanzees are more closely related to humans than to rhesus monkeys, as it is highlighted from the given options. This close relationship is evident through genetic comparisons and an assessment of our evolutionary history.