What is the source of the dust and gas found in interstellar clouds?

Material thrown out in the space because of a death of a star.

Explanation:

Most of the gas and dust found in the interstellar clouds come from death of a star. Either that star exploded (Supernova Explosion) or blew off its outer layers and thus sending this material into interstellar region. This gas and dust can be observed in IR spectrum as they radiate heat after absorbing the visible and UV light.

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement