The currents of the Earth's oceans are caused by
A.
marine organisms and volcanic eruptions.
B.
disturbances by submarines and large ships.
C.
waves and earthquakes along tectonic plate boundaries.
D.
global winds and differences in temperature and salinity.

Answer choice D.

different temperatures cause the water to rise and fall

it is the most commonly accepted one

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally