Question

1. how do placozoans eat?

by filtering ocean water
through photosynthesis
with jaws and teeth
through phagocytosis

Explanation:

Placozoans are simple marine organisms. They do not filter water (like some filter - feeders), nor do they perform photosynthesis (they are heterotrophic, not autotrophic like plants), and they lack jaws and teeth. Placozoans obtain food through phagocytosis, where they engulf food particles or prey.

Answer:

through phagocytosis (the option "through phagocytosis")