The gradual development or replacement of one ecological community by another is called ?

i think that d. wind is the answer.   i missed the question when i answered a. currents.

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.