Which type of wave results from a moderately sloping coastal region?
plunging breaker
spilling breaker
surging breaker
tsunami wave

The correct answer is spilling breaker.

Explanation:

The spilling breaker is also known as surf wave is an over-steepened wave in which the unsteady top of the wave tumbles down the front of the waveform as it progresses towards the shallower water. This results in a gradual reduction of the height of the wave unless it moves up the beach as swash.  The kind of wave, which arises from a moderately sloping coastal region will be a spilling breaker, as it is a common wave related to moderate beach gradient.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.