D. as clearly defined as possible so in order to narrow your speech.
The feeling of an object's surface is known as its D. texture<span>. The texture of an object is a physical property and describes how the object feels when upon touch. An example of an object with a smooth texture is glass, and an object with a rough texture is a paved road. The texture is useful in determining other properties of a substance, such as the amount of friction it provids.</span>
D, because the other three are very wide topics but you can explicitly discuss the effects and cause of MLK's bus boycott <span />
I need to see the frame from "lqbal" to answer your question.