The answer is D because you don’t need to put anything but a comma after you introduce who the letter is to
Answer:
Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called speed, being a coherent derived unit whose quantity is measured in the SI (metric system) as metres per second (m/s) or as the SI base unit of (m⋅s−1).
Friendly seems like it would complete this sentence the best.
1. Adobe. - a building made of sun-dried clay bricks.
2. Vivid - Very bright.
3. Humble - Very poor or plain.
4. Hogan - An earth-covered home of the Navajo.
5. Welled. - Filled up within.
6. Mutton. - Meat from sheep.
Hope it helps you <3!1