. Which of the following represents a fission reaction? Hydrogen-2 and helium-3 combining to form a helium-5 atom and a neutron Carbon-14 and helium-3 combining to form a sodium-13 atom and a proton Polonium-215 absorbing a proton to form polonium-218 Uranium-235 absorbing a neutron and breaking into barium-141, krypton-92, and three neutrons

Ans() ; the burning of them contributes to global warmingthey come from decayed organic material;

Large asteroid and comet impacts. because they can have a huge impact on the environment, such as a loss of land, and crust on the earth with the big holes they produce. on the other hand, volcanic eruptions can also cause change within the environment by producing land, but im actually not quite sure which one would be a better answer, hopefully you read this and didnt just flat out choose the first sentence i have spoken! your welcome~

This kind of reaction is called a synthesis otherwise known as combination reaction