<u>Answer:</u> The chemical equation is written below.
<u>Explanation:</u>
Transmutation is defined as the process in which one chemical isotope gets converted to another chemical isotope. The number of protons or neutrons in the isotope gets changed.
The chemical equation for the reaction of curium-242 nucleus with alpha particle (helium nucleus) follows:

The product formed in the nuclear reaction are californium-245 nucleus and a neutron particle.
I would say B because c and d would decrease competition and a would do the same, or just kill the ecosystem.
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The answer is B. Equilibrium means a state in which opposing forces or influences are balanced.
Hello, I would like to help you, but I really don't understand the question