______ is a practice of establishing and managing individual trees generally for amenity purposes.

Arboriculture

The correct answer is Option (4)- Arboriculture

The correct answer is Arboriculture.

Here's why the other options are not as suitable:

• Floriculture:This practice deals specifically with cultivating flowering plants for aesthetic purposes.

• Viniculture: This branch of agriculture focuses on the cultivation of grapes for winemaking.
• Silviculture: This field is concerned with the management of forests for timber and other purposes.

Arboriculture, on the other hand, specifically deals with the cultivation, management, and study of individual trees, often in urban or landscaped settings, for ornamental or amenity purposes. It involves practices like tree selection, planting, pruning, pest and disease control, and removal. So, arboriculture aligns perfectly with the concept of establishing and managing individual trees for amenity purposes.