The correct answer is (a) Oak.
Oak trees are deciduous trees that grow in temperate climates. They are found in forests, woodlands, and parks. Oak trees are an important part of the ecosystem, providing food and shelter for many animals.
Deodar trees are coniferous trees that grow in the Himalayas. They are an important part of the Himalayan ecosystem, providing food and shelter for many animals. Deodar trees are also used for timber and paper production.
Sal trees are deciduous trees that grow in the Indian subcontinent. They are an important part of the Indian ecosystem, providing food and shelter for many animals. Sal trees are also used for timber and paper production.
Rhododendron trees are evergreen shrubs or trees that grow in the Himalayas. They are an important part of the Himalayan ecosystem, providing food and shelter for many animals. Rhododendron trees are also used for ornamental purposes.
Oak trees are the only trees of the given options that grow at lower altitudes. They can be found in forests, woodlands, and parks at altitudes of up to 1,500 meters. Deodar trees, sal trees, and rhododendron trees grow at higher altitudes, typically above 2,000 meters.