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A crack or split in rock layers resulting in movement is:

a fault
a fold
a mistake
a glacier

a fault

Explanation:

A fault is a fracture in rock where there has been movement and displacement. When talking about earthquakes being along fault lines, a fault lies at the major boundaries between Earth's tectonic plates, in the crust, and the earthquakes result from the plates' movements.

A fault

Explanation:

A fault occurs when a land cracks open resulting in a deep trench-like shape. The fault then creates movements which can result in Earthquakes. Hoped this helped...

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.