question... What provides food and shelter to many ocean organisms?
Options:
- (A) houses
- (B) umbrellas
- (C) limestone
- (D) ferns
- (E) sharks
- (F) barnacles
- (G) calcite
- (H) sheds
answer... Coral reefs provide food and shelter to many ocean organisms. Coral reefs are predominantly calcite. Calcite provides food and shelter to many ocean organisms.
The answer is (G)

question... What are cells the basic units of the structure and function of?
Options:
- (A) humans
- (B) Most plants
- (C) animals
- (D) Cell service
- (E) Organisms
- (F) mammals
- (G) Lego cells
- (H) Buildings
answer... Cells are the basic units of the structure and function of living things. An organism is a living thing. Cells are the basic units of the structure and function of an organism.
The answer is (E)

question... What wets the skin, and when it evaporates, it cools the body?
Options:
- (A) Heat energy
- (B) salt and water
- (C) acetic acid
- (D) urine
- (E) ice
- (F) Chlorophyll
- (G) white vinegar
- (H) blood
answer...
Sweat wets the skin, and when it evaporates, it cools the body. Sweat is made of salt and water. Water and salt wets the skin, and when it evaporates, it cools the body.
The answer is (B)