Answer:b,c,d I think
Explanation:
B because it moves sediment, or sand, to the ocean, c because it pollutes the ocean with plastic and stuff, and d because the bacteria can be harmful
D.) It is an "Element".
[ Element cannot be separated by any means ]
Hope this helps!
Ep=mgh
In your case it's Ep = 2*9,8*1=19,6 J
D. The maximum kinetic energy and maximum potential energy are equal, but occur at different times.