Unlike ionic bonds, covalent bonds involve the
a. gain of one or more electrons by one atom from another.
b. development of positively and negatively charged ions.
c. sharing of electrons between atoms.
d. loss of one or more electrons from one atom to another.

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.