Passive voice dari kalimat A bunch of tiny cells where photosyintesis happens make leaves up

A bunch of tiny cells where leaves up are happened make photosynthesis

Leaves are made up by (of) a bunch of tiny cells where photosynthesis happens.
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“Nothing's perfect, the world's not perfect, but it's there for us, trying the best it can. That's what makes it so damn beautiful.” - Roy Mustang