Step 1: Understanding the Concept:
The question asks to identify the style of garden in which a tomb or mosque is a central architectural feature.
Step 2: Detailed Explanation:
Mughal gardens in India are renowned for their highly structured and symmetrical designs, heavily influenced by Persian gardens. A key characteristic of these gardens is their integration with significant architectural elements. They were often built to surround tombs (as in the case of the Taj Mahal or Humayun's Tomb) or palaces and mosques. These buildings serve as the focal point of the garden's layout, which typically features a rectilinear 'Charbagh' (four-part) design with water channels. The other garden styles have different focal points: Japanese gardens focus on natural elements like rocks and water, English gardens on creating an idealized natural landscape, and French gardens on grand vistas and geometric parterres.
Step 3: Final Answer:
A tomb or mosque is a main feature of a Mughal Garden.