What kind of stimulus travels from the motor neuron to skeletal muscle?

There are two types of stimulus that travel within our body. The two types are chemical and electrical. Electrical stimulus is the type of stimulus that travels from the motor neuron to the skeletal muscle. Electrical muscle stimulation is the elicitation of muscle contraction using electric impulses.

D.) domain, kingdom, phylum, class, order, family, genus, species

Ibelieve is d but i’m not 100% sure