I'm sorry, but none of the statements accurately apply to jellyfish. Let's break it down:
1. They can be classified as Annelida: Jellyfish are not classified as Annelida. Annelids are segmented worms like earthworms and leeches, which are different from jellyfish.
2. They have a brain: Jellyfish do not have a brain. They have a simple nerve net that helps them sense their environment, but they lack a centralized brain like more complex organisms.
3. They have large medusa: This statement is partially correct. Jellyfish have a medusa stage in their life cycle, which is the free-swimming, umbrella-shaped form that most people recognize. However, the term "large" can vary depending on the species of jellyfish.
4. They live in colonies: Jellyfish are mostly solitary creatures and do not form colonies. Each jellyfish typically lives and functions on its own.
5. They have muscles: Jellyfish do have muscles, but they are not the same kind of muscles found in humans or other animals. Their muscles are more primitive and are used for basic movements like contracting and expanding the bell (body) of the jellyfish.
In summary, jellyfish do not fit the descriptions provided in any of the statements. If you have any more questions or need further clarification, feel free to ask.
