Question

How do latitudes and longitudes help in locating a point? Why is only one of them insufficient in doing this? ​

Answer 1

because they are cross sectional

it helps in locating a point

Answer 2

Latitudes and longitudes form a grid. Two different points may lie on the same latitude or the same longitude. But there exists only one point where latitude and longitude intersect. So a point can be identified with the help of the latitude and longitude on which it lies.