Question

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$\fbox \pink {Q}\fbox \blue {u} \fbox \purple {e} \fbox \green{s} \fbox \red {t} \fbox \orange {i} \fbox{o} \fbox \blue{n}$

$\fbox \green{what} \: \fbox \purple {is} \: \fbox \blue{combustion}$
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Answer 1

Answer:

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

Answer 2

Answer:

Erosion

Erosion is the picking up and removal of earth's material (e.g., soil) by wind, running water and glacier. b) Rill Erosion: a rill is the smallest channel eroded by the flow of water or any liquid. 3. Erosion leaves the land bare and unproductive.