Which of the following takes the least time to degrade?

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Metal cans

Plastic toys

Polythene bags

Leftover food

answer is D.

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Detailed Solution

Polythene bags, Metal cans, and Plastic toys are non-biodegradable substances. These substances can not be decomposed by microorganisms and take several years to degrade completely.

Leftover food takes the least time to degrade because it is biodegradable. It can be decomposed by microorganisms present in the surroundings.

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