So, I don't know the answer for b but I think I found the answer for a.
I sincerely hope this isn't wrong
Answer:
C
Explanation:
A pride of lions working together suggests the opposite of competition.
Same comment about the water buffalo.
The answer is C. If the territory is invaded and the two males clash, that's competition.
A Cheetah is not part of the Lion's Pride.
Answer:
Any element
Explanation:
Any element that produces an extra proton, aka a Hydrogen cation, or H⁺