The Root

To solve the problem, we need to determine which of the given plants absorbs oxygen through aerial roots.

1. Understanding Aerial Roots:
Aerial roots are specialized roots that grow above the ground and can perform various functions, such as support, nutrient absorption, or gas exchange. In some plants, these roots play a crucial role in absorbing oxygen, especially in environments where the soil is waterlogged or lacks sufficient oxygen.

2. Analyzing Each Option:

• (A) Mango: Mango trees do not have aerial roots. They rely on their underground root system for nutrient and oxygen absorption.
• (B) Mangroves: Mangroves are coastal plants that grow in saline, waterlogged soils. To cope with low oxygen levels in the waterlogged soil, mangroves develop specialized aerial roots called "breathing roots" or "pneumatophores." These roots extend above the waterline and allow the plant to absorb oxygen directly from the air.
• (C) Banana: Banana plants do not have aerial roots. They rely on their underground root system for nutrient and oxygen absorption.
• (D) Rose: Rose plants do not have aerial roots. They rely on their underground root system for nutrient and oxygen absorption.

3. Conclusion:
Mangroves are known for their ability to absorb oxygen through aerial roots, which help them survive in waterlogged, oxygen-poor environments.

Final Answer: The correct answer is (B): Mangroves