Those chemicals absorbs heat from the surrounding while reacting
Some minerals can form from the air combining with substances, they can form from igneous rock, and sometimes minerals can re crystalize from metamorphic rock
The answer is C. The symbiotic relationship has evolved for so many years such that the two are obligate symbiotes and cannot function normally without the other. Chloroplast and mitochondria are believed to have been once free-living bacteria according to endosymbiosis theory.