Answer:
Sexual reproduction begins with sperm and egg cells, which are produced through a process called meiosis. ... Sexual reproduction occurs in both plants and animals. Among plants it is used most notably by flowering plants. The pollen grains of flowers contain the sperm
Explanation:
The mitochondria and cholorplasts are the 2 organelles found in eukaryotic cells that are supposed to have been independent long ago :)
Rivers with regularly floods leaves fertile soil along their banks which is why a civilization will choose to live near there.
<h3>
What is Fertile?</h3>
This is defined as the ability of land to produce crops and vegetation in abundant quantities.
Flooding washes minerals and humus to the bank of rivers which favors growth of plants which is why option D was chosen.
Read more about Flooding here brainly.com/question/134213
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