Natural pollution includes smog. Smog is a combination of smoke in an air and fogs.
When you say natural pollution, it is not being caused by human rather caused by a natural resources or organism.
Falling leaves are natural, but its not a pollution.
Answer: circulatory system
Explanation:
The digestive system operates very closely with the circulatory system for delivery of the ingested nutrients through the body. The circulatory system carries also chemical signals from the endocrine system that regulate digestion speed.
The circulatory system works closely with skeletal muscle as well to provide efficient oxygen and nutrient transfer necessary for contraction and inhibitory waste products removal.
Hence, the correct option is circulatory system.
Answer:
False. it occurs only in the presence of light
Answer:
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