According to the dichotomous key, stentor would be a member of the kingdom

A) Animalia.

B) Fungi.

C) Plantae.

D) Protista.

D) Protista

Explanation:

The Dichotomous key is a organized set of couplets of mutual characteristics of biological organisms. This key begins with general characteristics and leads couplets indicating specific characteristics. Dichotomous key is a key that allow the user to identify type of items in natural world. Stentor is one of the largest protozoa found in water. Stentor is a single cell. An organism can be of 2 mm in length making them visible to human eye and it is even larger than many multi celled organisms. Stentor is eukaryote means it has nuclear membrane. It is commonly found in fresh water ponds.