Explanation:

- Marketed surplus: This is the portion of agricultural produce that farmers sell in the market after keeping enough for their own consumption. It's crucial for the supply chain and impacts market prices.

- Trade deficit: This occurs when a country imports more goods and services than it exports, leading to an imbalance in trade.

- Subsidy: Financial assistance provided by the government to help reduce costs for producers, often used in agriculture to support farmers.

- Import substitution: An economic policy that encourages replacing foreign imports with domestic production to boost local industries.