Place the items in order from lowest to highest degree of internal organization.

I pressum this is what you are looking for. Tissues, cells, organ systems, organs, and organism.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

im not exactly sure but i think its b!