The type of chromosomal mutation that involves the addition of chromosome sections is Deletion
Subsitution
Insertion
None of these above

The type of chromosomal mutation that involves the addition of chromosome sections is translocation, so the answer is none of these above.

Explanation:

Chromosomal mutations refer to the alteration in the number of genes or in the way they are organized within a chromosome, which is due to errors in gametogenesis. They are also called non-punctual mutations.

Alterations in the structure of chromosomes considered mutations can be

Translocation occurs when a section of a chromosome is incorporated into another non-homologous chromosome. That is to say, chromosomal mutation  involves the addition of chromosome sections to other chromosome.

    Deletion is a chromosomal mutation that does not correspond to the description. Inversion and substitution are molecular mutations of DNA.

answer; //the above statement is (false);