The answer is photosynthesis.
<span>Photosynthesis
occurs in the leaves of green plants. During photosynthesis, carbon
dioxide and water are converted into using the energy of
sunlight to glucose and oxygen. After great evolution of plants, the photosynthetic rate was increased. More plants mean more oxygen produced in the process of photosynthesis. Thus, photosynthesis </span><span> is most responsible for the increase in early Earth’s atmospheric oxygen levels.</span>
Three reasons a species could become extinct include, deforestation, being overhunted, not enough food available.
Bodily functions that help keep it stable. Like sweating when your are hot keeps your body at a cooler temperature rather then burning up.
#6 is A. They are all composed of one or more cells.
It seems that you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. The statement about wildfires in deciduous forests that is not true is this: <span>Deciduous forests are unaffected by wildfires. Hope this answers your question.</span>