Ans: (E)
Question: What learns to behave through playing?
Options:
- (A) otters
- (B) bacteria
- (C) viruses
- (D) rocks
- (E) lions
- (F) animals
- (G) humans
- (H) Birds
CoT: Playing is just one of many ways that mammals and other animals learn how to behave. Mammals include lions, bears, dogs, horses, cattle and antelopes. Playing is one way that lions learn how to behave.

Ans: (D)
Question: What is the process of removing feces and excess water from the human body called?
Options:
- (A) recycling
- (B) salivation
- (C) waste production
- (D) excretion
- (E) Exfoliation
- (F) perspiration
- (G) Deposition.
- (H) Deposition
CoT: Excretion is the process of removing wastes and excess water from the body. Solid waste is called feces. Excretion is the process of removing feces and excess water from the body.

Ans: (G)
Question: What have a centralized nervous system with a brain?
Options:
- (A) objects that have mass
- (B) warm-blooded
- (C) Earth orbiting the Sun
- (D) jellyfish
- (E) salmon only
- (F) bass only
- (G) bass and salmon
- (H) chickens
CoT: Fish have a centralized nervous system with a brain. Fish include bass and salmon. Bass and salmon have a centralized nervous system with a brain.