How do lines of latitude and longitude help geographers study Earth?

How do lines of latitude and longitude help geographers study Earth?
A) These lines help geographers identify the different landforms on Earth. 
B) These lines help geographers pinpoint exact locations on Earth’s surface. 
C) These lines help geographers see the difference between oceans and landforms on Earth’s surface. 
D) These lines show geographers the direction of Earth’s rotation around the sun.

AnswerB) These lines help geographers pinpoint exact locations on Earth’s surface.