Problem: OPTIONS:
- Alcohol
- ozone
- water
- vapors
- heat
- blood
- NaCl
- shale
Q: Fact 1: Condensing means changing from a gas into a liquid by reducing heat energy. Fact 2: Water can easily condense on the cold end of the probe. Given the two facts above, what can be a gas or a liquid?
Answer: water

Problem:OPTIONS:
- Plankton
- food
- glucose
- Fish
- Flowers
- Energy.
- Energy
- Other clams

Fact 1: Bivalves feed on plankton and nonliving organic matter. Fact 2: Clams and oysters are examples of bivalves. Given the two facts above, what do clams feed on?
****
A: Plankton

Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: Coral is calcium carbonate with a trade of carotene. Given the two facts above, a reef is made of?
OPTIONS:
- it keeps an organism warm
- salt and water.
- granite
- magnesium
- gastropod shells
- ocean water
- calcium carbonate
- zinc
calcium carbonate

Fact 1: Aplant requires water to grow. Fact 2: After a seed is planted it is watered. Given the two facts above, what do seeds need?
OPTIONS:
- water
- warmth
- flowers
- food
- Enzymes
- sand
- protein
- ocean

Answer: water

Question: Fact 1: An aquatic animal requires great amounts of water to survive. Fact 2: Beavers are primarily aquatic animals. Given the two facts above, what's one thing beavers require to survive?
OPTIONS:
- kinetic energy
- Giardiasis
- the looseness of soil
- Great amounts of water.
- living things
- American black bears
- Aquatic animals
- sense organs
Answer: Great amounts of water.

input: OPTIONS:
- Veins and arteries.
- lack of backbone
- bruised brain stem
- critical organs
- closed circulatory system
- incomplete circulatory system
- characteristics
- sensory neurons Now, answer this question: Fact 1: Chordates have a complete digestive system and a closed circulatory system. Fact 2: Vertebrates are members of of a larger group, the chordates . Given the two facts above, vertebrates have a complete digestive system and a what?
A:
output:
closed circulatory system