input: OPTIONS:
- arthritis
- headache
- sunburn
- heartburn Now, answer this question: Q: What is a common condition caused by stomach acid? A:
A:
output: heartburn

Q: What substances contained in lemons, vinegar, and sour candies have a sour taste? A:

OPTIONS:
- proteins
- fats
- lactose
- acids

Answer: acids

Problem: OPTIONS:
- carbons
- systems
- families
- organs
Q: Q: Plants are complex organisms with tissues organized into what? A:
Answer: organs

Problem:OPTIONS:
- carbon
- hydrogen
- nitrogen
- oxygen

Q: The products of photosynthesis are glucose and what else? A:
****
A: oxygen

Q: What determines sex in animals? A:
OPTIONS:
- cell structure
- ribosomes
- cell density
- sex chromosomes
sex chromosomes

Q: What is the most widely used form of renewable energy in the world? A:
OPTIONS:
- wind
- fossil fuel
- solar
- hydropower

Answer:
hydropower