Answer:
understanding the material
Explanation:
i know that may sound drab but it is super true so if you get someone who understands the material to explain it to you you will be a professional at whatever it is you are studying
The coral reefs are in danger because the earth traps gasses in and the gasses that are trapped are a type of gas that heats the ocean and it kills the corals and then they bleach so then they have no use to house fish and other creatures.