Define folds and draw neat sketch of a fold and label its different parts.

Define folds and draw neat sketch of a fold and label its different parts. 
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Answer :

Fold: Folds may be defined as undulations or bends that are developed in the rock of the Earth’s crust, as a result of stresses (commonly lateral compression) To which these rocks have been subjected to, from time to time in the past history of the Earth.

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