The southern hemisphere starts at 0 and ends at south pole. what's the measurement
of the south pole?

The South Pole is 90 degrees South.

Explanation:

This measurement is a line of latitude. The Earth is a sphere. As such, it is divided up like protractor. If you could simply walk straight through the Earth It would be a straight line. The North pole is 90 degrees North and the South is 90 degrees South. We use these measurements to indicate directions are crucial to help us navigate and explain what happens on Earth.

the correct answers are:

a - pacific plate;

it is the biggest oceanic tectonic plate. surrounded on all sides by continental tectonic plates, it is submerging and gradually becoming smaller and smaller.

b - north american plate;

huge continental plate, occupying big portion of the northern hemisphere.

c -eurasian plate;

alongside the north american plate, it is one of the two dominant continental plates in the northern hemisphere.

d - indian plate;

a small continental plate, that has been part of gondwanaland initially, but after the break up of it, moved towards northeast and pushed into the eurasian plate that was once part of laurasia.

it depends on the situation, but in a definitional sense, irrendentism is more valid.

explanation: