q: What regrows broken off segments of itself?
Options:
- (A) barnacles
- (B) teeth
- (C) roots
- (D) earthworm
- (E) Leptospirosis
- (F) spiders
- (G) cells
- (H) root growth
a: (D)... Explanation: Annelids have the amazing capacity to regrow segments that break off. Earthworms are annelids meaning segmented. Earthworms can regrow broken off segments of their bodies. That's why the answer is (D).

q: How do many plants respond to days getting shorter in autumn?
Options:
- (A) Change colors
- (B) spread seed
- (C) Exfoliation
- (D) bioaerosols
- (E) grow a layer of fur
- (F) go dormant
- (G) adding heat
- (H) enlarge themselves
a: (F)... Explanation: Many plants respond to the days growing shorter in the fall by going dormant. Autumn or Fall is already here. Many plants respond to the days growing shorter in the autumn by going dormant. That's why the answer is (F).

q: Soil can be depleted of a thing that fertilizers can what to soil?
Options:
- (A) grow
- (B) add
- (C) loss
- (D) pH
- (E) harm
- (F) corn
- (G) peat
- (H) kill
a: (B)... Explanation: Soil can be depleted of nutrients. Fertilizers add nutrients to the soil. Soil can be depleted of what fertilizers can add to soil. That's why the answer is (B).

q: What is the process of breaking down food proteins into energy or heat?
Options:
- (A) dissecting
- (B) dehydration
- (C) elimination
- (D) energy
- (E) digestion
- (F) Cooking
- (G) calorie retention
- (H) Evaporation
a:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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(E)... Explanation: Digestion is the process of breaking down food into components the body can absorb. Food proteins are changed into energy or heat to be used or absorbed by the body. Digestion is the process of breaking down food proteins into energy or heat. That's why the answer is (E).