External Respiration takes place in the Trachea. When oxygen and co2 "switch" its where they connect and making this external respiration!
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The answer is b wind energy
Answer:
Dung beetles lives in the animal dung and take nutrients from the undigested substances present in the dung. This dung is mixed with the soil by the beetle to increase the fertility of the soil. These nutrients is taken by plants with water through roots and makes their food in the form of carbohydrate from it in the process of photosynthesis. This carbohydrate is stored in different parts of plant body.
It could quasatic monumim that comes from the middle of the earth