What is not a possible component in nuclear control rods?
a. boron
b. neutron-absorbing material
c. cadmium
d. neutron-emitting material

The correct answer is Option D.

Explanation:

Nuclear control rods are defined as the rods which are used in nuclear reactor plants to control the fission rate of uranium and plutonium.

These rods are made up of few chemical elements like boron, silver, indium and cadmium. These rods have the capability of absorbing many neutrons without getting fissioned itself.

Thus, from the above information, the correct answer comes out to be Option D.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

the answers would be

the first one and the second one