I would say overhunting and overfishing
A food allergy is when you have a disturbing tolerance or allergic reactions to a specific type of food.
Cheers,Irys :3
Scientists can determine the age of the seafloor by watching the constant changing magnetic field of our planet. When it cools down, it records the magnetic field during its formation. The two parts of the oceanic plate are pulled apart, and magnetic stripes become older as they move away from the mid-ocean ridge. Hope that helps!
This link should be much helpful to your question and provide more than what you are asking to https://infogr.am/alexgrey_1398868104
They did not have the materials