Commercially important timber trees found in Manipur include:

Teak
Sal
Pine
All of the above

The correct answer is: All of the above.

Teak, sal, and pine are all commercially important timber trees found in Manipur. Teak is a hardwood tree that is prized for its strength, durability, and resistance to decay. It is used in a variety of applications, including furniture, flooring, and boatbuilding. Sal is a softwood tree that is used in a variety of applications, including construction, papermaking, and fuelwood. Pine is a softwood tree that is used in a variety of applications, including construction, furniture, and papermaking.

Teak is a large, deciduous tree that is native to tropical and subtropical regions of Asia. It is the most important commercial timber tree in India and is also grown in other countries, such as Myanmar, Thailand, and Vietnam. Teak trees can grow to be over 100 feet tall and have a trunk diameter of up to 6 feet. The leaves are large and oval, and the flowers are small and white. Teak wood is light brown to golden brown in color and has a straight grain. It is strong, durable, and resistant to decay. Teak is used in a variety of applications, including furniture, flooring, boatbuilding, and railway sleepers.

Sal is a large, deciduous tree that is native to tropical and subtropical regions of Asia. It is the most important commercial timber tree in India and is also grown in other countries, such as Myanmar, Thailand, and Vietnam. Sal trees can grow to be over 100 feet tall and have a trunk diameter of up to 6 feet. The leaves are large and oval, and the flowers are small and white. Sal wood is light brown to reddish brown in color and has a straight grain. It is strong, durable, and resistant to decay. Sal is used in a variety of applications, including construction, papermaking, and fuelwood.

Pine is a coniferous tree that is native to temperate regions of the Northern Hemisphere. It is the most important commercial timber tree in the world and is also grown in other countries, such as South America, Africa, and Australia. Pine trees can grow to be over 100 feet tall and have a trunk diameter of up to 6 feet. The leaves are needle-like, and the flowers are small and green. Pine wood is light brown to reddish brown in color and has a straight grain. It is strong, durable, and resistant to decay. Pine is used in a variety of applications, including construction, furniture, and papermaking.