Answer:
The definition and answer to the question is following;
Stratum basale is the deepest/innermost layer of the epidermis. Histologically, the stratum basale is a single layer of cuboidal keratinocytes that directly abut and attach to the dermis.
The two main functions of the stratum basale are as follows;
1) proliferation
2) attachment of the epidermis to the dermis.