In molecular compounds molecules bonded tk gether by a) covalent bond
b)metallic bond
c)ionic bond
d)none of them

a) Covalent bond

Explanation:

Atoms of different element are held together in molecules by covalent bonds in which atoms share their valence electrons with each other.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: