When people don't know how to drive the boat correctly and they loose control.
Solar radiation, because it hasn't (at least noticeably) affected hawks.
Answer:
When conducting research, scientists use the scientific method to collect measurable, empirical evidence in an experiment related to a hypothesis (often in the form of an if/then statement), the results aiming to support or contradict a theory.
Explanation:
I don't know if it can help you
It's a reflex to protect your eye.
