Cells<span> need a source of </span>energy<span>, they </span>get<span> this </span>energy<span> by breaking down food molecules to release, the stored chemical </span>energy.This process is called 'cellular<span>respiration'. The process is happens in all the </span>cells<span> in our body. Oxygen is used to oxidize food, main oxidized food is sugar(glucose).</span>
7: symbiotic relationship
8: mutualism
9: commensalism
<span>strip-cropping:cultivation of crops in strips following the contours of the land</span>
Answer:
C
Explanation:
Active transport requires energy, while passive energy does not.
It is water pollution, since you are polluting the river.
Hope I helped!
