Ummm.... I'm not seeing anything that looks like a bonsai to me. I see a pot with two trees in it.
The large tree looks possibly dead. The way to tell is first to break a small branch/twig. If it snaps easily and is dry inside, it is dead. If so, scrape the bark of the trunk with a fingernail. If under the bark it is green and moist, the tree is still alive. If it is grey/ brown and dry, it is dead.
The small one looks healthy and with more bonsai potential, but should not be in the same pot with the large tree.
Although the word bonsai literally means tree in a pot, the art of bonsai is more than that. It is to create a tree that gives the illusion of being a full-sized old tree with character, somehow miniaturized.
This shows the elements of a bonsai including: nebari, which are above the surface radiating roots, that give the tree a visual foundation and "rootedness;" thick trunk relative to the tree size with pronounced taper; "movement" which is changes in direction of the trunk, curvature, slant, something that carries your eye along through the lines of the tree; orderliness of branches with alternating directions and clean lines with space between.