Concept:Yam species are classified by their botanical names.
Explanation:Yam belongs to the family
Dioscoreaceae.
It is a root and tuber crop commonly grown in West Africa.
Yam is rich in carbohydrates and serves as a major source of energy.
There are several cultivated species of yam, each with its own scientific name.
Water yam is the common name given to
Dioscorea alata.
This species is known for its high moisture content and soft texture, hence the name "water yam."
Other common species include yellow yam (
Dioscorea cayenensis), white yam (
Dioscorea rotundata), and aerial yam (
Dioscorea bulbifera).
Among the options provided, water yam is correctly identified as
Dioscorea alata.
Answer:A.
Dioscorea alata