Pick and copy all the incorrect options for the following question:

Which question can be answered through scientific investigation?

Options:
- 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?





- Why are tigers more beautiful than iguanas?



- What is the best subject to study at college?



- Should humans invest in space travel?

