Forces between compounds that hold them in place

intermolecular forces and intramolecular forces

Explanation:

Intermolecular forces can be described as the forces that are present between molecule or compounds.

Intramolecular forces are forces which are present within a compound or molecule.

For example, consider HCl which is made of hydrogen and chlorine atoms. The forces which will be present between the molecules of HCl will be called as intermolecular forces. The forces which will be present between hydrogen and chlorine will be termed as intramolecular forces.

during expiration the diaphragm relaxes, which causes the diaphragm to move downwards. the contraction of diaphragm increases the space for expansion of lungs. hence, the diaphragm relaxes and positioned downward during expiration.