REWORD THIS IN YOUR OWN WORDS! They are eukaryotic, which means they have a nucleus. Most have mitochondria. They can be parasites. They all prefer aquatic or moist environments.

Eukaryotic organisms have no nucleus and prefer aquatic or moist environments. Interestingly, some are parasites, and some do not have mitochondria.

Explanation:

You may need to add some more sentences to better link these two together.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.