The carbon cycle describes the way the element carbon moves between the Earth's biosphere, hydrosphere, atmosphere, and geosphere. It is important for a few reasons: Carbon is an essential element for all life, so understanding how it moves helps us to understand biological processes and factors that influence them.
Source: Google
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<span>C is the correct answer. The forebrain is the largest region of the brain, accounting for around two thirds of the brain's mass. It contains the cerebrum, olfactory and optic cranial nerves, frontal, parietal, occipital and temporal lobes, and the thalamus, hypothalamus and pituitary gland.</span>
1. Populations changing over generations
2. Gradual change
3. Speciation
4. Natural selection
5. Common descent
First option, Echo sounding
