Question

fossils are generally going to be more useful for studying animals that lived in or near water (e.g., streams, lakes, oceans, etc.) because
dead animals that fall into water are more likely to be in conditions that allow fossilization.
the water prevents the organisms from being eaten by scavengers.
water is where most rocks form.
all animals need water.
no decomposers are living in water.

Explanation:

Fossilization requires specific conditions. Water environments often have sediment that can quickly cover dead organisms, protecting them from scavengers and decomposition. This covering helps preserve the remains and allows for fossilization. While water may prevent some scavenging (but not all), the key is the conditions for fossilization. Most rocks don't form only in water. All animals needing water is not relevant to fossil usefulness. And there are decomposers in water.

Answer:

dead animals that fall into water are more likely to be in conditions that allow fossilization.