Anucleotide sequence changes from tagcat to taggcat. what type of mutation occurred? deletion substitution insertion

Insertion  

Explanation:

An insertion can be defined as the addition or insertion of one or more base pair into the DNA segment or sequence.

This can happen in any segment of the DNA. This mutation can lead to the production of faulty gene or non-faulty gene. Insertions can be anywhere in size from one chromosome inserted in the other one.

The reason can be unequal crossing over during the time of meiosis. There is an insertion of Guanine base pair in between Guanine and cytosine.

d. groundwater flows through the subsoil and deposits minerals.