What a hypothesis that two organisms from different species are related to each other is best supported by?

Are substances released into the environment that in excess amounts cause damage

Which would be an adaptation in a rainforest, but not in a tundra? a. ability to store water for a long time b. fur that blends in with snow c. strong claws for killing prey d. a beak that can dig into thick trees

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.