Line 1: *Many plants respond to the days growing shorter in the fall by going dormant. After the autumnal equinox, days gradually shorten in the Northern Hemisphere. Many plants respond to the autumnal equinox by going dormant.*
*(C)*
Line 2: *Many plants go dormant during the 
Options:
- (A) heat or cold
- (B) earth's revolving
- (C) autumnal equinox
- (D) colder and wetter
- (E) It helps them survive
- (F) cloudy and rainy weather
- (G) Plant growth is reduced
- (H) fire conditions*
Logic of a solution: *Biomass is the total mass of organisms at a trophic level. An organism is a living thing. Biomass is the total mass of living things at a trophic level.*
*(E)*
The original question: *Biomass is the total mass of what at a trophic level?
Options:
- (A) Plants growth
- (B) peachleaf willow
- (C) Conifers
- (D) animals
- (E) living things
- (F) Most plants
- (G) all matter
- (H) insects*
Line 1: *Air pollution harms the respiratory and circulatory systems. Cars are a significant source of air pollution. Cars harm the respiratory and circulatory systems.*
*(D)*
Line 2: *What harms the respiratory and circulatory systems?
Options:
- (A) oil
- (B) rain
- (C) sulfur
- (D) cars
- (E) tires
- (F) coal
- (G) tar
- (H) bicycles*
Logic of a solution: *Freshwater biomes have water that contains little or no salt. Freshwater biomes have suffered mainly from pollution. Biomes that have suffered mainly from pollution have water that contains little or no salt.*
*(D)*
The original question: *Biomes that have suffered mainly from pollution have water that contains little or no what?
Options:
- (A) Toxins
- (B) CO 2
- (C) liquid
- (D) salt
- (E) Lead
- (F) Carbon
- (G) Acids
- (H) sulfur*
Line 1: *Population density is the average number of individuals per unit of area or volume. Another measure of growth is population density. Growth of an area can be determined by the average number of people per unit of area.*
*(D)*
Line 2: *What can be determined by the average number of people per one unit of area?
Options:
- (A) hygeine
- (B) emissions
- (C) animals
- (D) growth
- (E) forces
- (F) health
- (G) education
- (H) people*
Line 1: *Bird beaks are generally adapted for the food they eat. Birds eat the fish, algae and human food. Bird beaks are often adapted for eating fish.*
*(B)*
Line 2:

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
*What are bird beaks often adapted to eat?
Options:
- (A) moles.
- (B) fish
- (C) nests
- (D) chicks
- (E) trees
- (F) apples
- (G) edible
- (H) Fruits*