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What processes changed the Earth's environment during Precambrian time?

(ps. please use your own words)

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OK PLEASE HELP ME​

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░░░▌░▄▄▄▐▌▀▀▀░░ This is Bob

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Step-by-step explanation:

i think its photosinthisis because...

Step-by-step explanation:

Sometime around 3 billion years ago (about 1.5 billion years after Earth formed!), photosynthesis began. Photosynthesis allowed organisms to use sunlight and inorganic molecules, such as carbon dioxide and water, to create chemical energy that they could use for food.

Hope this helps and maybe a brainlest?

the answer is a

step-by-step explanation: