input: OPTIONS:
- salt and water.
- Deoxyribonucleicacid
- water and iodine
- looseness
- Veins and arteries.
- salt and calcium
- salt and oxygen
- deoxyribonucleic acid Now, answer this question: Fact 1: Asolution is formed by one substance being dissolved in another substance. Fact 2: Salinity refers to salts dissolved in water. Given the two facts above, what are the two ingredients of a saline solution?
A:
output: salt and water.

Fact 1: Echinoderms have a unique water vascular system with tube feet. Fact 2: Another group of echinoderms are the echinoids. Given the two facts above, which has a unique water vascular system?

OPTIONS:
- roots
- trees
- Conifers
- Echinoids
- fur seals
- Most plants
- ferns
- bushes

Answer: Echinoids

Problem: OPTIONS:
- chickenpox
- rainfall
- bottled water
- Pesticides
- flooding
- the amount of people drinking
- disease
- acid rain
Q: Fact 1: Acid rain has a negative impact on water quality. Fact 2: H20 Bottled water was generally consumed last year. Given the two facts above, what has a negative impact on H20 quality?
Answer: acid rain

Problem:OPTIONS:
- activation energy
- ice
- electricity
- snow
- glaciers
- burning wood
- Electrical energy
- Fuel cells

Fact 1: Burning wood is used to produce heat. Fact 2: Heat is added and the temperature of the water increases. Given the two facts above, what is used to increase temperature?
****
A: burning wood

Fact 1: Smoking causes direct damage to the lungs. Fact 2: Smoke from cigarettes contains tar, which sticks to the cilia in our lungs. Given the two facts above, what causes damage to the lungs?
OPTIONS:
- breathing
- tar
- HPV
- fire
- CFCs
- sunshine
- coal
- mist
tar

Fact 1: Ejaculation occurs when muscle contractions propel sperm from the epididymes. Fact 2: Bacteria usually cause epididymitis. Given the two facts above, bacterial infection can inhibit ejaculation of what?
OPTIONS:
- babies
- sperm
- sugar
- animals
- erection
- eggs
- humans
- pregnancy

Answer:
sperm