Everything you need to make a good meaningful sentence (and grammatically correct, of course), is to follow common rules. Do not forget to provide your sentence with complexity, but you don't have to make them too complicated, I mean you need to use key words, they will make your thought completed. And the second point is that you need to properly organize the sentence using correct word order. ion:
The answer is A) High relief.
I hope this helps.
Have a great day. :)
Elements of Art:
Line: Helps create shapes. Also known as moving point. Vary in thickness, direction, and length. One-dimensional. Abstract, descriptive, implied.
Shape: Flat, enclosed areas (with length and height). Two-dimensional. Geometric or organic.
Color: There are primary colors, secondary colors, etc. (different kinds of color schemes). Hue is the name of a color. Saturated/Intensity-- (ex: dull or faint. bright or strong).
Value: lightness (adding tint) or darkness (adding shade) of a hue. In between/middle is the area of grayness.
Form: Three-dimensional. Height, width, and depth. Can also be free flowing.
Texture: The surface quality (of an object). There is actual texture and implied texture.
Space: Helps give the illusion of depth. Positive and negative areas are defined.
The altarpiece is made up of gilt bronze and is on view at The Met.