Which of the following processes returns carbon to the atmosphere?

Respiration is a process in which carbon is released in the atmosphere in the form of carbondioxide.

Explanation:

Respiration is energy generating process. In this process, food substance which contains glucose molecule is broken down in the mitochondria of the cell which releases carbondioxide, water and energy in the form of Adenine tri phosphate (ATP). Energy is used by the cell in different processes and activities while Carbondioxode gas is released in the atmosphere.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.