A mower deck can’t cut grass unless it is connected to the tractor engine. This is usually done in one of two ways, with some possible permutations.
Riding mowers, lawn tractors, lawn and garden tractors, and garden tractors are large and powerful. They can be dangerous if not used safely.
One of the factors that most affects both the capability of a lawn/garden tractor, and the price, is the engine.
The LSU AgCenter and the LSU College of Agriculture