In general the warmest biomes in the world are found
a. at the poles
b. in the southern hemisphere
c. near the equator
d. on the western coasts of continents

The warmest biomes are: Tropical Rainforest, Tropical seasonal forest/Savanna and Subtropical desert. They are found mostly around the equator: on all continents that cross the equator: South America, Africa and Asia.

The correct answer is:
c. near the equator

Answerstratovolcanoes///near or in the ring of fire;

Well, a and b together would be negative. b alone would also be negative.