Understanding Structural Changes in Development

Economic development is often characterized by significant shifts in the structure of a country's economy. These 'structural changes' involve alterations in the relative importance of different economic sectors, such as agriculture, industry, and services.

Key Indicator Analysis

The question asks for an indicator of these structural changes as a country develops. Let's analyze the options:

• Option 1: The share of the industrial sector in GDP decreases

  This is typically seen in highly developed economies, indicating a shift towards services (deindustrialization), not an early or mid-stage development indicator.

• Option 2: The share of agriculture in GDP declines

  This is a primary indicator of economic development. As economies develop, labor and resources shift from agriculture to manufacturing (industry) and services, leading to a relative decrease in agriculture's contribution to the Gross Domestic Product (GDP).

• Option 3: The share of agriculture in GDP increases

  An increasing share of agriculture usually signifies economic stagnation or underdevelopment, the opposite of development.

• Option 4: The share of agriculture in GDP becomes more than 50 percent

  This describes a predominantly agrarian and underdeveloped economy, not one undergoing development-driven structural changes.

Therefore, the decline in the agricultural sector's share of GDP is a key sign of structural change associated with economic development.