Correct Option
The correct option is (b).
Explanation
The Sahara Desert is a hot desert biome characterized by extreme aridity, high temperatures, and scanty rainfall. The vegetation found here is xerophytic, meaning it is biologically adapted to survive in dry conditions through mechanisms such as deep root systems, thick bark, waxy surfaces, and modified leaves (spines) to minimize water loss.
Statement-wise Analysis
- 1. Cactus: Correct. While most cacti are native to the Americas, standard geography curricula classify cactus as a representative xerophytic plant found in the Sahara Desert due to its succulent nature and ability to store water.
- 2. Date palms: Correct. Date palms are a prominent feature of the Sahara Desert landscape, specifically growing near oases where groundwater is accessible near the surface.
- 3. Acacia: Correct. Acacia trees are widely distributed in arid and semi-arid regions like the Sahara. They possess long taproots to reach deep groundwater and small leaves to reduce transpiration.
- 4. Pine: Incorrect. Pine trees are coniferous gymnosperms characteristic of temperate, sub-arctic, or high-altitude mountain regions (such as the Himalayas or Taiga). They are adapted to cold climates and are not found in hot desert environments.
Key Takeaway
The vegetation of the Sahara Desert primarily consists of drought-resistant flora such as cactus, acacia, and date palms. Temperate softwoods like pine are restricted to cooler, mountainous, or high-latitude regions.