Explanation Pair 1 is correctly matched: Herbs are small, non-woody plants with soft stems that complete their life-cycle in one or two growing seasons. Mustard (Brassica spp.) is a classic example of a herb, as it has a soft stem and is cultivated for its seeds and leaves.
Pair 2 is not correctly matched: Climbers are plants with weak stems that need external support to grow vertically. Watermelon (Citrullus lanatus), however, is a creeper, not a climber.
Creepers spread along the ground due to their weak stems.
Pair 3 is not correctly matched: Shrubs are medium-sized, woody plants with multiple stems emerging from the base. Examples include rose, hibiscus, and cotton. Wild grasses, such as elephant grass or vetiver, do not qualify as shrubs, as they belong to the Poaceae (grass) family and lack woody stems.
Pair 4 is correctly matched: Trees are large, woody plants with a single main trunk and branches.
Khejri (Prosopis cineraria) is a drought-resistant tree found in arid regions, including the Thar Desert of India. It is vital for its ecological and cultural significance in Rajasthan.
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