HELP ASAP <><><><>< ;><><><><&g t;<><><><>& lt;><><>What processes changed the Earth's environment during Precambrian time?

please helpp ​

Step-by-step explanation:

New varieties began to harness the power of the sun through a biochemical process known as photosynthesis—a move that would ultimately lead to simple plants and which opened the planet up to animal life. Some three billion years ago, the Earth's atmosphere was virtually devoid of oxygen.

8

step-by-step explanation:

this is a subtraction problem.

10 - 2 = 8

the amount you'd have after the work is $1.55

step-by-step explanation:

you subtract 95% from $31.