Introduction:
The equatorial belt is the region around the Earth's equator, known for its warm climate and diverse ecosystems. It is characterized by high temperatures, rainfall, and an abundance of vegetation. The continent with the largest area in the equatorial belt is Africa.

Reasons for Africa having the largest area in the equatorial belt:
1. Geographic Location:
- Africa is the only continent that is crossed by the equator, making it the most significant landmass in the equatorial belt.
- The equator runs through several African countries, including Kenya, Uganda, Democratic Republic of Congo, Gabon, and Sao Tome and Principe.
- This geographic positioning places a large part of Africa within the equatorial belt.

2. Size:
- Africa is the second-largest continent in terms of land area, after Asia.
- It spans over 30 million square kilometers, covering about 20% of the Earth's total land area.
- The vast expanse of Africa contributes to its dominance in the equatorial belt.

3. Equatorial Climate:
- The equatorial climate is characterized by high temperatures and heavy rainfall throughout the year.
- Africa's proximity to the equator exposes a significant portion of the continent to this climate type.
- The equatorial climate supports the growth of dense rainforests and diverse flora and fauna, which are prominent features of Africa.

4. Biodiversity:
- Africa is renowned for its rich biodiversity, with a wide variety of plant and animal species.
- The equatorial belt in Africa encompasses the Congo Basin, the second-largest tropical rainforest in the world.
- This region is home to numerous unique and endemic species, including gorillas, chimpanzees, elephants, and a diverse array of bird species.
- The abundance of biodiversity in Africa further emphasizes its significance in the equatorial belt.

5. Economic Importance:
- The equatorial belt in Africa holds vast natural resources, such as oil, minerals, and timber.
- These resources contribute significantly to the continent's economy and global trade.
- Many African countries within the equatorial belt rely on these resources for their economic development and stability.

Conclusion:
Africa is the continent with the largest area in the equatorial belt due to its geographic location, size, equatorial climate, rich biodiversity, and economic importance. Its positioning along the equator and the presence of the Congo Basin rainforest make Africa a prominent landmass in the equatorial belt, contributing to its dominance in this region.