(question). What has woody stems covered with bark?
Options:
- (A) sunflowers
- (B) Newton
- (C) ferns
- (D) seaweed
- (E) Most plants
- (F) palm trees
- (G) evergreens
- (H) orchids
(answer). Trees have woody stems covered with bark. Orange trees are evergreen trees. Evergreens have woody stems covered with bark.
The answer is (G)


(question). How can animals with six legs detect sound?
Options:
- (A) thorax
- (B) Refract it
- (C) electricity
- (D) they bend
- (E) wings
- (F) environment
- (G) pupils
- (H) antennae
(answer). Some insects can use their antennae to detect sound. Every insect has six legs, that's an insect. Animals with six legs can use their antennae to detect sound.
The answer is (H)


(question). What does an earthworm do that would help plants?
Options:
- (A) reusing materials
- (B) It helps them survive
- (C) eat the plant
- (D) scare away birds
- (E) reproduce
- (F) hydrate their cells
- (G) burrow in the dirt
- (H) eat all the dirt
(answer). Earthworm burrows help aerate soil, which is also good for plants. Dirt is really misplaced soil. Earthworm burrows help aerate dirt, which is also good for plants.
The answer is (G)


(question). What gas is produced by burning propane?
Options:
- (A) Greenhouse gases
- (B) Sulfur dioxide
- (C) gasoline
- (D) Carbon monoxide
- (E) hydrocarbons
- (F) carbon dioxide
- (G) dangerous
- (H) heating liquids
(answer).

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.
user
Carbon monoxide is a gas produced by furnaces and other devices that burn fuel. Cabins have wood burning stoves and propane furnaces. Carbon monoxide is a gas produced by burning propane.
The answer is (D)