Fact 1: Mollusks are a major food source for other organisms, including humans. Fact 2: Mollusks are invertebrates and are no exception. Given the two facts above, what is a major food source for other organisms, including humans?

OPTIONS:
- gastropod shells
- orchids
- invertebrates
- swamp vegetation
- Most plants
- insects
- barnacles
- animals

Answer: invertebrates

Problem: OPTIONS:
- starfish
- barnacles
- blowfish
- our planet
- humans
- Pesticides
- insects
- sharks
Q: Fact 1: Echinoderms lack a centralized nervous system. Fact 2: Echinoderms are represented by the starfish. Given the two facts above, what lacks a centralized nervous system?
Answer: starfish

Problem:OPTIONS:
- testes
- matter vibrating
- zygotes
- gametes
- kinetic energy
- chemical messengers
- Veins and arteries.
- electromagnetic energy

Fact 1: Endocrine hormones travel throughout the body in the blood. Fact 2: Hormones, produced by the endocrine system, act as chemical messengers targeting specific organs. Given the two facts above, what travel throughout the body in the blood?
****
A: chemical messengers

Fact 1: Electricity sometimes is used for heating buildings. Fact 2: Electricity is electrons in motion. Given the two facts above, what is used for heating buildings?
OPTIONS:
- electrons in motion
- protons in motion
- coiled neutrons
- one celled organisms
- Movement of an air mass
- clouds
- igniting fuel and oxidiser
- compound of hydrogen oxygen
electrons in motion

Fact 1: Acid rain has a negative impact on water quality. Fact 2: Acid rain is partly caused by CFCs. Given the two facts above, what have a negative impact on water quality?
OPTIONS:
- CFCs
- oxygen
- hydrogen
- oil
- h2o
- mines
- fungi
- Cars

Answer: CFCs

input with options: Fact 1: Lungs are used for breathing air by land animals. Fact 2: Elephants are the largest animals on land. Given the two facts above, what uses lungs to breathe air?
OPTIONS:
- elephants
- Frogs
- humans
- the sun
- some mammals
- monotremes
- bacteria
- rock candy
output:
elephants