Does the speaker use formal or informal language what is the effect of this choice

What is the meaning of life? its for a language arts i need facts about what makes people happy will delete bad answers

Atopic list should contain a. main topics covered in class c. important vocabulary words b. main ideas from the text book d. all of these

There are many types of animals without back bones. what type of information will follow? a) a list of animals without backbones. b) the scientific name for animals without backbones. c) descriptions of animals with backbones. d) an explanation of where animals without backbones live.