Question

When it is hit, its color will change. What it covers is complex and how it stretches is strange. What am I?

Answer 1

the answer is skin.
as if we hit it it change its colour
it covers the whole body it is in a complex thing.and it can be stretched and looks strange.

Answer 2

Skin is the answer........ 

1. when we hit our skin, it changes its colour. (for a few minutes though)
2. covers the whole body and is complex
3. It stretches, and looks kinda weird.

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