Final answer:
Farmer's Fair Phyllis is written for four voices. It is a madrigal, often performed a cappella with intricate counterpoint and harmonies.
Step-by-step explanation:
The piece Farmer's Fair Phyllis is written for four voices. This piece is a madrigal, which is a form of secular vocal music composition that was popular during the Renaissance and early Baroque periods. Madrigals are typically written for four to six voices and involve intricate counterpoint and harmonies that are sung a cappella, meaning without instrumental accompaniment.