The moon accelerates because it is

continuously increasing its speed of orbit

constantly increasing the diameter of its orbit

in a vacuum in space

continuously changing direction

answer

The answer for your question is the first one

The moon accelerates because it is continuously increasing its speed of orbit

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.