Answer:
Mammals are different from fish, reptiles or birds
Explanation:
This is the correct answer because since dolphins are mammals, they are very different from the other types of animals such as fish, reptiles, or birds; this is emphasized in this paragraph ;)
There are quite a few English words that contain letters that are not suppose to be said including: debt and write. These left out letters can often tell us about the history and origin of the word and some places in the world has these which can tell us about who lived there at the time. This is called etymology.
Hope that this answer helped. ☺
