I think its <span>activation energy.</span>
The answer is A.
Because osmosis involve water.
<span>As paleontologist you are essentially a scientist who studies fossils. Your main focus lies on the boundary between biology and geology. You have to learn the past of the fossils while adapt the knowledge to current species.</span>
A lot of the energy from photosynthesis flows out as heat.
^answer
When energy is being transported or flowed through the ecosystem most of the heat is lost.
Hope this helps!