Final answer:
The sentence that suggests the Yeti avoids people is A, indicating its shyness and preference for remote habitats.
Step-by-step explanation:
The sentence that best helps to develop the idea that the Yeti avoids people is option A: "This shy Yeti, also sometimes known by the alias the Abominable Snowman, dwells in the remote mountains leaving only tracks in the snow as proof of its presence." This sentence directly suggests that the Yeti is elusive and avoids contact with humans, as indicated by its described shyness and the remote habitat it chooses to live in, where it leaves only traces of its existence.