The correct sequence in the decreasing order of contribution of different sectors to the Gross Domestic Product (GDP) of India is Option 1: Services—Industry—Agriculture.

India`s economy has undergone significant changes over the years, transitioning from primarily agricultural-based to a more diversified economy with a strong services sector. Let`s examine each sector`s contribution and the reasoning behind the given sequence:

1. Services: The services sector is the largest contributor to India`s GDP. It includes various industries such as banking, finance, insurance, IT, telecommunications, hospitality, healthcare, education, and more. India has emerged as a global hub for outsourcing services and software development. The services sector has experienced remarkable growth due to factors like increased domestic consumption, rising disposable income, urbanization, and globalization. It has been a major source of employment and revenue generation for the country.

2. Industry: The industrial sector holds the second position in terms of GDP contribution. It encompasses manufacturing, construction, mining, energy production, and infrastructure development. India has witnessed a gradual shift from an agrarian economy to a more industrialized one. The industrial sector has experienced considerable growth, driven by policies promoting manufacturing, foreign direct investment (FDI), and initiatives like "Make in India." However, it is important to note that the services sector has surpassed the industry sector in recent years due to its rapid expansion.

3. Agriculture: Although agriculture was historically the backbone of India`s economy, its contribution to GDP has declined over time. Agriculture includes activities related to crop production, animal husbandry, forestry, and fishing. While a significant proportion of India`s population is still engaged in agriculture, its share in GDP has decreased due to various reasons. These include the challenges of fragmented landholdings, reliance on monsoon rains, inadequate irrigation facilities, lack of modern farming techniques, and limited access to credit and markets. However, agriculture remains crucial for ensuring food security, livelihoods, and rural development.

Based on these factors, Option 1: Services—Industry—Agriculture represents the correct sequence, with the services sector being the largest contributor to India`s GDP, followed by the industry sector, and then the agriculture sector.