This physiological process allows plants to make their own food. Being able to make their own food through the process of photosynthesis, plants, unlike animals, no longer need to feed on other organisms in order to exist and survive. And since sunlight is required for this essential physiological process to occur, sunlight therefore makes the plants stronger.

Through the physiological process of photosynthesis, plants are able to release oxygen, the presence of which guarantees that existence of life on earth will continue. According to Hackel, the oxygen in the earth's atmosphere was released over 3,500 million years ago through plant photosynthesis and "without plants, there would be no oxygen in the earth's atmosphere." (22) The sun not only makes plants stronger, it also helps ensure that life on this planet continues.

Sunlight is also required by some plants in order to germinate. The sun helps the seeds of plants to...
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