This is because elements are pure substances with only one atom. When two or more elements are combined, you get compound elements; which allows for more substances to be created.
Answer:
When an organ is transplanted in the body, the immune system will attack the organ as it would attack any foreign cell. The use of it in transplant surgeries decreases the strength of the immune system by reducing its antibody production in order to reduce its attacks on the new organ.
(hope this helped <3 brain list? if not then that's fine :D)
I think the answer is Inertia but that might be a different law of his. I’m not 100% sure
The third image. The ball bounces back up after hitting the force of the floor
