Ethylene gas is known to cause fruit to ripen. As the fruit ripens, it produces elevated amounts of ethylene. This process is an example of positive feedback.
negative feedback.
homeostasis.
endocrine regulation.

a: the sheep and waste material both release carbon into the atmosphere.

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the answer is:

carbon dioxide

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.