How does solar energy affect cloud formation? Why are tigers more beautiful than iguanas? What is the best subject to study at college? Should humans invest in space travel?
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which question can be answered through scientific investigation?
Possibilities:
- How does solar energy affect cloud formation?
- Why are tigers more beautiful than iguanas?
- What is the best subject to study at college?
- Should humans invest in space travel?

How does solar energy affect cloud formation?