Of the following reactions, which is a fusion reaction? a. uranium-235 absorbing a neutron and splitting into xenon-140, strontium-94, and two neutrons b. hydrochloric acid combining with sodium hydroxide to form a salt and water c. carbon-14 decaying into nitrogen-14 and a beta particle d. curium-246 combining with carbon-12 to form nobelium-254 and four neutrons

The fusion reaction is:
D. Curium-246 combining with carbon-12 to form nobelium-254 and four neutrons.

A fusion reaction is a type of nuclear reaction where two smaller nuclei come together with high energy to form a larger nucleus and possibly create other subatomic particles. Fusion reactions emit tremendous amounts of energy. A classical example of a fusion reaction is the combination of hydrogen to form helium, which occurs in the sun and provides it with its energy.

The masses of the objects and their densities

The answer to this is decibel