Many different types of mutations can occur within the body. an individual experience a mutation that changes a base in a trna strand, but during translation the trna strand still creates the same protein. which type of mutation is responsible for the change in the trna base

I guess the answer for this would be the DNA but i'm not sure tho, I haven't see this things since a long time.

Silent mutation.

Explanation:

A silent mutation  may be defined as a change in the single nucleotide base without any change in the amino acid and result in the formation of the same protein.

Mutation has changed a single base of tRNA strand but this does not change the protein product. This means the mutation has not changed  the amino acid.

Thus, silent mutation is responsible for the change in the tRNA base

it should be d) transitional fossils.

they show the gradualism of evolution throughout a period of time