Which type of vehicle is described as primarily a farm implement that draws an implement of husbandry?

A farm tractor is specifically designed as a farm implement used for agricultural purposes, particularly for drawing or operating implements of husbandry. This is a key distinction because farm tractors are built to provide the necessary power and traction to handle tasks such as plowing, tilling, and transporting heavy loads across fields. They are typically equipped with a hitch for attaching various agricultural implements, like plows and seeders, which are essential for farming operations.

In contrast, a pickup truck, medium truck, and utility vehicle are designed for different primary functions, such as transportation of goods and passengers, and do not fit the specific definition of being primarily a farm implement. While they may be used in agricultural settings, they lack the specialized features and capabilities that define a farm tractor. Therefore, identifying the farm tractor as the correct answer underscores its unique role in agricultural machinery.