Answer:
Troposphere.
Explanation:
Humans live most of their lives in the troposphere atmosphere.
When old red blood cells rupture, the released hemoglobin is ingested by macrophages
The answer is constellation.
Answer: The GCF is 4
Explanation: The factors of 52 are 52, 26, 13, 4, 2, 1. The factors of 92 are 92, 46, 23, 4, 2, 1. So the GCF is 4.