What are the functions of a leaf ?
1.to make food and control how much water is sent to the root 2. to store food and absorb water 3. to make lignin and allow the plant to grow 4. to make food and control how much water leaves the plant

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

plz give brainliest

it's c. elements are placed in rows based on how may valencies electrons have.