Green revolution means :-

Options

A. Increase in production of food plants
B. Increase in growth of green plants for maintaining ecosystem balance
C. Growth of green plants in order to check soil erosion
D. Production of green algae

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Green Revolution":**
- The Green Revolution refers to a significant increase in agricultural production, particularly in developing countries, during the mid-20th century.

2. **Identifying Key Components:**
- The Green Revolution is characterized by the introduction of high-yielding varieties (HYVs) of crops, which are genetically improved to produce more food.
- It also involves the use of chemical fertilizers, pesticides, and advanced agricultural techniques and machinery to enhance crop growth and productivity.

3. **Evaluating the Options:**
- **Option A:** Increase in production of food plants - This aligns with the definition of the Green Revolution as it focuses on increasing crop yields.
- **Option B:** Increase in growth of green plants for maintaining ecosystem balance - This does not specifically relate to the Green Revolution's goal of increasing food production.
- **Option C:** Growth of green plants in order to check soil erosion - While important, this is not the primary focus of the Green Revolution.
- **Option D:** Production of green algae - This is unrelated to the concept of the Green Revolution.

4. **Conclusion:**
- Based on the analysis, the correct answer is **Option A: Increase in production of food plants.**