Element with six less protons than CI

Sodium (Na)

Explanation:

The number of protons an element has is the same as its atomic number (number at the top of each element box) Cl is element numer 17, so it has 17 protons. 17-6 is equal to 11 protons. Sodium's atomic number is 11.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.