Problem: OPTIONS:
- overpopulation
- depletion
- mutation
- extinction
Q: Q: By impacting plant species and the animals they support, destruction of habitat threatens what event? A:
Answer: extinction

Problem:OPTIONS:
- beds
- layers
- crystals
- reefs

Q: Corals build hard exoskeletons that grow to become coral what? A:
****
A: reefs

Q: Amino acids are joined together to form a chain at what molecular structure? A:
OPTIONS:
- chloroplasts
- chromosomes
- DNA
- ribosomes
ribosomes

Q: Ecology is a major branch of what higher-level "classification" of science? A:
OPTIONS:
- chemistry
- physics
- geology
- biology

Answer: biology

Question: Q: Most metals exist in which form at room temperature? A:
OPTIONS:
- gases
- liquids
- oils
- solids
Answer: solids

input: OPTIONS:
- volume
- temperature
- density
- energy Now, answer this question: Q: What is the ability to change or move matter? A:
A:
output:
energy