Final answer:
Endoparasites have the advantage of avoiding hosts' immune defenses.
Step-by-step explanation:
The statement that is true regarding the relative advantages of a steadier supply of food in the context of endoparasitism and ectoparasites is that endoparasites have the advantage of avoiding hosts' immune defenses.
Endoparasites are parasites that live inside the host's body, which allows them to bypass the host's immune system to some extent. This gives them a better chance of surviving and reproducing. On the other hand, ectoparasites, which live on the host's body surface, are more exposed to the host's immune defenses.
By avoiding the host's immune system, endoparasites can maintain a more stable and consistent supply of food compared to ectoparasites, which may face more challenges due to the host's immune defenses.