The wetlands of Punjab, including the Harike Wetland, support:

The correct answer is: b) Aquatic plants.

The wetlands of Punjab, including the Harike Wetland, support a variety of aquatic plants, including algae, water lilies, and lotus. These plants provide food and shelter for a variety of animals, including fish, birds, and insects. The wetlands also play an important role in flood control and water purification.

Mangrove vegetation is found in tropical and subtropical coastal areas. Deciduous trees lose their leaves in the fall, while thorny bushes have sharp thorns on their branches. None of these types of vegetation are found in the wetlands of Punjab.