Q: Plants make food from what?
Options:
- (A) Chemical energy
- (B) inorganic molecules
- (C) photosynthesis
- (D) Light passing through water
- (E) direct energy
- (F) absorb light energy
- (G) Organic compounds
- (H) In their leaves
A: So, my chain of thought: Producers make food from inorganic molecules. Plants are known as producers . Plants make food from inorganic molecules. The answer is (B).

Q: What is ethanol produced from?
Options:
- (A) coal
- (B) sugar
- (C) SO2
- (D) animal fat
- (E) paper
- (F) salts
- (G) Trees
- (H) Oak
A: So, my chain of thought: Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants. Glucose, a type of sugar, is the body's fuel. Ethanol is produced by alcoholic fermentation of the sugar in corn or other plants. The answer is (B).

Q: Biomass is the total mass of living things at each what?
Options:
- (A) trophic level
- (B) important habitats
- (C) Energy.
- (D) food and shelter
- (E) Power plants
- (F) animals
- (G) body water
- (H) heat energy
A:
So, my chain of thought: Biomass is the total mass of organisms at a trophic level. Most living things are called organisms. Biomass is the total mass of living things at a trophic level. The answer is (A).