What are the names of the two magnetic poles?
Ur answer is
North and South
This is more to do with Bioaccumulation of mercury, where the mercury is absorbed into the issue of animals, and so animals higher in the food chain consume a lot of tissue matter hence increasing mercury content in their system.
C- more than one light year or B-exactly one light year
c) nervous and endocrine system
Hope I helped! ( Smiles )
