<span>The French term<u> avant-garde</u> is usually reserved for artists or artworks that challenge existing conventions of art. The individual or works have a tendency to be radical, revolutionary, and/or unconventional in regard to art, culture, and society.</span>
<span>the application of techniques like mass production
Let's look at the available options and see what makes sense.
the use of heat and open fires for cooking
- This sounds like the discovery of fire and as such it happened a long time before the nineteenth century. Wrong answer.
the application of techniques like mass production
- This one looks promising. We'll take if the other 3 options are just plain silly.
the introduction of earthenware such as clay vessels
- This is more recent than the discovery of fire. But it's still a long time ago. Literally thousands of years BC. So wrong answer.
the discovery of the technique of roasting raw foods
- Another discovery that happened thousands of years ago. So also the wrong answer.
So of the 4 choices, 3 of them happened literally thousands of years ago and so well before the nineteenth century. That leaves only 1 viable choices, so the answer is "the application of techniques like mass production"</span>
A - The reason being is because of atmospheric perspective, it's most commonly used and more well known with point perspective that gives drawings, paintings, or otherwise 2D mediums a 3D feeling.
Spatial perspective is usually used within natural / organic compositions because of the foggy or distant feeling it can give.
Interest because of how many different techniques you can accomplish with perspective such as one point, two point, or three point perspective. Such an example would be in architectural mock sketches of the finished building or project.
Depth, as stated before depth and space are both hand and hand. Depth gives the feeling of something coming alive or making a circle into a sphere with shadows by using light, creating layers of rock on a cliff face instead of a sheer drop, moreover; detail.
