Question

What is leaf?
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Answer 1

Leaf is the flat part of plant.It is green in colour due to presence of chlorophyll
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Answer 2

$\huge \color{darkblue}{Hey} \\ \\ \huge \boxed{Here \: is \: your \: answer} \\ \\ \\ \\ \bf \: \: answer: A \: flattened \: structure \: of \: a \: higher \: plant, \\ \bf \: typically \: green \: and \: blade-like, \: that \: is \: attached \: to \: \\ \bf \: a \: stem \: directly \: or via \: a \: stalk. \: Leaves \: are \: the \: main \: organs \: \\ \bf \: of \: photosynthesis \: and \: transpiration. \: \\ \\ \huge \boxed{Thank \: you} \:$