I will give u brain thing if its correct / Define amplitude.

the maximum extent of a vibration or oscillation, measured from the position of equilibrium.

"the amplitude of alpha rhythms"

FOR PHYSICS

the maximum extent of a vibration or oscillation, measured from the position of equilibrium.

"the amplitude of alpha rhythms"

AND FOR ASTRONOMY

the angular distance of a celestial object from the true east or west point of the horizon at rising or setting.

it would be d). more resources must be obtained to attain that combination of goods and services