What happens to the frequency of the wave if you increase the wavelength, keeping the velocity of the wave constant?

There isn't any-way to change the wave speed or the propagation speed, unless performed by changing the density of the medium. Increasing the frequency would cause the wavelength to become shorter, which is confirmed with both light and sound. Since the speed slows in a denser material we are allowed to create lenses and prisms.

The masses of the objects and their densities

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.