Ahmedabad is often referred to as the "Manchester of India." This title is attributed to Ahmedabad due to its historical significance as a major center for textile manufacturing and the cotton industry. Just as Manchester in the United Kingdom is renowned for its textile heritage, Ahmedabad has played a crucial role in India's textile industry, making it a significant industrial and economic hub.

In the Indian numbering system, 100 million is equal to 10 crores. 1 crore is equal to 1,00,00,000. 100 million can also be written as 10 crores. 

Answer: D) nutrients and other life-sustaining molecules are in limited supply and must be continually recycled Explanation: Biogeochemical cycles are crucial to ecosystem function because ::   1. Chemical elements are available in only limited amounts and must be recycled. 2. Nutrients and other life-sustaining molecules are in limited supply and must be continually recycled.