What happens when an increase in heat in Earths systems affects the ice caps?

a
This is describing a negative feedback loop
b
positive feedback loops are good, and create stability in a system
c
With an increase in heat energy into the system, the ice caps will melt, less reflection, more heat, more melting aka positive feedback loop
d
with an increase in heat energy into the system, ice caps will grow, more reflection, less heat, more ice growth