Select all of the answers that apply.

i think its one and fore

1,2

1,2

I HATE YOUR IDIOT

To select all the correct answers, we will analyze each statement:

1) The statement "the elevations of contour lines must always be whole number multiples of the contour interval" is correct. When reading a topographic map, contour lines represent points of equal elevation. The value of each contour line is usually a multiple of the contour interval, which is the vertical distance between the contour lines.

2) The statement "the thin line separating two different rock units is a contact line" is incorrect. Topographic maps do not depict rock units or geological boundaries. They primarily display the elevation and relief of a terrain.

3) The statement "points inside a contour line are at a higher elevation than the contour line" is incorrect. Inside a contour line, the elevation remains constant, meaning points inside a contour line have the same elevation as the contour line.

4) The statement "strike-and-dip symbols indicate the degrees of tilt of rock strata" is correct. Strike-and-dip symbols are used in geological maps to represent the orientation and inclination of rock layers in a given area.

Therefore, the correct answers are 1) and 4).