Temperature and oxygen level
Answer:
Explanation:Photosynthesis and aerobic respiration are both part of a cyclic process of biochemical reactions. ... Photosynthesis requires the products of aerobic respiration (carbon dioxide and water), while aerobic respiration requires the products of photosynthesis (glucose and oxygen).
A protostar forms once the nebular cloud condenses and the core begins to heat. To heat is the answer hope this helps you!!
