Answer:
Sound waves move through a medium by means of particle-to-particle interaction. The source disturbs the immediately surrounding particles, causing them to vibrate about their fixed position at the same frequency as the source.
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C. both animals and plants have changed over time
I believe it is cytokinesis because that explains as: the cytoplasmic division of a cell at the end of mitosis.
a large group of plants that are defined as those land plants that have lignified tissues for conducting water and minerals throughout the plant