Problem: OPTIONS:
- neon
- carbon
- nitrogen
- helium
Q: Q: Stars spend most of their lives on the main sequence, fusing hydrogen into what? A:
Answer: helium

Problem:OPTIONS:
- opaque
- solid
- dense
- matter

Q: Anything that occupies space and has mass is known as what? A:
****
A: matter

Q: Catalysts can greatly increase the rates of chemical what? A:
OPTIONS:
- photosynthesis
- decay
- effects
- reactions
reactions

Q: A major source of primary pollutants is the burning of oil and coal, which are types of what? A:
OPTIONS:
- erosion fuels
- renewable fuels
- greenhouse gases
- fossil fuels

Answer: fossil fuels

Question: Q: Mineralocorticoids are hormones synthesized by the adrenal cortex that affect what balance, by regulating sodium and water levels? A:
OPTIONS:
- blood pressure
- homeostasis
- equilibrium
- osmotic
Answer: osmotic

input: OPTIONS:
- biology
- radiology
- anthropology
- ecology Now, answer this question: Q: What is the term for the study of how living things interact with each other and with their environment? A:
A:
output:
ecology