What kind of waves can travel through both matter and empty spcace

An electromagnetic wave

Explanation:

An electromagnetic wave is a transverse wave that can travel across space as well as through matter. When it travels through space, it doesn't lose energy to a medium as a mechanical wave does.

EM (electromagnetic) Waves

Explanation:

Light Waves (AKA EM waves) can travel through both matter and empty space. Light waves transmit energy by compressing the particles in mediums. Light waves can travel with and without mediums.

*light waves are the same as electromagnetic waves, they are the same thing*

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

a. to encourage apoptosis