Answer:
<h3>C.
Gold has 79 protons.</h3>
<em>Atomic number defined as the number of electrons </em><em>or</em><em> </em><em> </em><em>n</em><em>u</em><em>m</em><em>b</em><em>e</em><em>r</em><em> </em><em>o</em><em>f</em><em> </em><em>protons in an atom's free state.</em>
<h2>
HOPE U UNDERSTOOD</h2>
HOPE U UNDERSTOODMARK AS BRAINLIEST ONE
Any doubts?v Please COMMENT..
Horsehair worms 1 or more
Nematodes 1 or more
Acanthocephala 2 or more
Annelids Leeches
I believe the answer is Myelin sheath. Myelin is a fatty substance that surrounds the axon of some nerve cells (neurons), forming an electrically insulating layer. It is essential for the proper functioning of the nervous system. It is an outgrowth of a type of glial cell, produced by the process called myelination or myelinogenesis.