What about earth allows it to maintain bodies of water?
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a. strong magnetic fields and lunar tides
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b. moderate temperatures and strong gravity
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c. weak gravity and high temperatures
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d. comet crashes and mountains

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.