Q: You are presented with the quiz "what can power plants cause?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "gases from burning coal and oil dissolving in water in the atmosphere causes acid rain" and "coal-fired power plants contribute to acid rain". So, what's the best answer to the question?

OPTIONS:
- Pesticides
- wind
- heat energy
- acid rain
- friction
- Pollution
- coal
- oil

A: acid rain

Q: You are presented with the quiz "what are formed by carbonic acid in groundwater seeping through rock dissolving limestone" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "acavern is formed by carbonic acid in groundwater seeping through rock and dissolving limestone" and "caverns are characterized by enormous rooms". So, what's the best answer to the question?

OPTIONS:
- oceans
- Calcium carbonate
- coral reefs
- enormous rooms
- a solute
- creeks
- Greenhouse gasses
- a hydraulic system

A: enormous rooms

Q: You are presented with the quiz "what can erosion cause?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "erosion can cause a landslide" and "landslides can be destructive". So, what's the best answer to the question?

OPTIONS:
- construction
- instructions
- flooding
- erosion
- contamination
- soil
- Pollution
- destruction

A: destruction

Q: You are presented with the quiz "Chondrocytes contain which type of protein?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cartilage is a tough tissue that contains a protein called collagen" and "cartilage cells are called chondrocytes in mature cartilage". So, what's the best answer to the question?

OPTIONS:
- Actin
- Keratin
- white
- allow growth
- Collagen
- ligt
- positive
- Hemoglobin

A:
Collagen