Problem: OPTIONS:
- it receives more sunlight
- it melts
- movement of tectonic plates
- it receives less sunlight
- tectonic plates being pushed together
- heat is produced
- It used to be covered by water
- it receives no sunlight
Q: Fact 1: When a hemisphere is tilted towards the sun , that hemisphere receives more direct sunlight.  Fact 2: Another named half of the earth is the so-called Pacific hemisphere.  Given the two facts above, what happens to half of Earth when it tilts towards the Sun ?
Answer: it receives more sunlight
Problem: OPTIONS:
- essentials of life
- competition
- wind speed
- living things
- single-celled organisms
- deforestation
- biodiversity
- rock content
Q: Fact 1: If the amount of available food and water decreases in an environment then animals may leave that environment to find food and water.  Fact 2: Food, water and air are the essentials of life on earth.  Given the two facts above, what can decrease in an environment, and may cause animals to leave?
Answer: essentials of life
Problem: OPTIONS:
- carbon monoxide
- harmful substances
- fossil fuels
- heat energy
- one celled organisms
- hard outer covering
- layers of fat
- Pituitary gland
Q: Fact 1: Riding a bike does not cause pollution.  Fact 2: Carbon monoxide is, of course, an air pollutant.  Given the two facts above, what is not released after riding a bike?
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