Problem:OPTIONS:
- Reverse osmosis
- fossil fuels
- Fresh water
- Carbon filter
- chlorofluorocarbons
- Sulfur dioxide
- Pollution
- harmful substances

Fact 1: Acid rain has a negative impact on water quality. Fact 2: Sulfur dioxide causes acid rain. Given the two facts above, what has a negative impact on water quality?
****
A: Sulfur dioxide

Fact 1: Lymphocytes are the key cells involved in the immune response. Fact 2: Lymphocytes are produced in the bone marrow. Given the two facts above, where are the key cells involved in the immune response made?
OPTIONS:
- bloodstream
- humans
- mitosis
- bone marrow
- organs
- Epidermis
- critical organs
- stomach
bone marrow

Fact 1: Nectar is used for attracting pollinators by plants. Fact 2: Pollinators: Bees, and particularly honey bees, are the primary pollinators. Given the two facts above, what do plants use to attract bees?
OPTIONS:
- nektar
- hormones
- chemicals
- necklaces
- employee lounges
- cellulose
- sweet music
- energy

Answer: nektar

Question: Fact 1: Shelter is used for protection by animals against weather. Fact 2: All kinds of weather are discussed including hurricanes. Given the two facts above, what protects animals in the event of a hurricane?
OPTIONS:
- loose soil
- shelter
- wind
- sunshine
- trees
- appendages
- clouds
- Collagen
Answer: shelter

input with options: Fact 1: Antigens are found on cancer cells and the cells of transplanted organs. Fact 2: If an antigen causes cancer, it is referred to as a pathogen. Given the two facts above, what are antigens also?
OPTIONS:
- resistance
- negative
- humans
- positive
- pathogens
- more abundant
- complex
- Allergies
output: pathogens

Problem: OPTIONS:
- thermal shields
- thermal detonation
- thermal expansion
- Plant growth is reduced
- chemical reaction
- Evaporation
- kinetic energy
- thermal heat
Q: Fact 1: Increasing heat causes thermal expansion. Fact 2: An increase in temperature is the result of the flow of heat into the system. Given the two facts above, he flow of heat into the system causes what?
Answer:
thermal expansion