Which feature of junipers makes them good at preventing soil erosion a. their large, broad leaves b. their tendency to grow densely on steep slopes c. their tendency to burn explosively d. their cones

The correct answer is option B, that is, their tendency to grow densely on steep slopes.  

Erosion refers to the movement of the components of the soil, mainly the surface of topsoil and litter from one place to another. In undisturbed ecosystems, the roots of plants assist in holding the soil, and generally, the soil is not lost faster than it forms.  

The steep slopes usually exhibit no or little soil on them due to gravity. The runoff from precipitation seems to erode the slope also. However, in such cases, trees like junipers helps to bind the soil together due to their tendency to grow densely on steep slopes.