Here's why:

* Diploid cells have two sets of chromosomes (one set from each parent).

* Mitosis is a process where a single cell divides into two identical daughter cells. Each daughter cell receives a complete copy of the parent cell's chromosomes, maintaining the diploid state.

In contrast, meiosis is the type of cell division that produces haploid cells (cells with one set of chromosomes), which are used for sexual reproduction.