Coral reefs have a symbiotic relationship with algae. Because of human activity, the ocean is absorbing high levels of _________ , which causes an increase in ocean temperature. Due to these unfavorable conditions, corals expel algae, leading to _________.
FIRST BLANK:
A. Oxygen
B. Biodiversity
C. Carbon dioxide

SECOND BLANK:
A. Biomagnification
B. Bleaching
C.Fragmentation