Answer:
oxygen was produced by phosynthesis
Explanation:
kkkkk
66° N and 90° N
the area of the artic circle in the northern hemisphere
I believe it is speed.
Hope this helps!
<span>Two of them are "redshift" and "blueshift", which are used to describe an object'smotion toward or away from us in space. Redshift indicates that an object is moving away from us. "Blueshift" is a term that astronomers use to describe an object that is moving toward another object or toward us.</span>