State whether the following statements are true or false. If false, correct them.
Air helps in the movements of sailing yachts and glider but plays no role in the flight of birds and aeroplanes

Explanation

To determine whether the statement is true or false, we can break it down step by step.

### Step 1: Analyze the Statement
The statement claims that "Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and aeroplanes."

### Step 2: Identify the Components
- **Part 1**: Air helps in the movement of sailing yachts and gliders.
- **Part 2**: Air plays no role in the flight of birds and aeroplanes.

### Step 3: Evaluate Part 1
- **True**: It is true that air helps in the movement of sailing yachts and gliders. Both of these rely on wind (which is air in motion) to move.

### Step 4: Evaluate Part 2
- **False**: This part of the statement is false. Air plays a crucial role in the flight of birds and aeroplanes. Birds use air to generate lift with their wings, and aeroplanes rely on the principles of aerodynamics, which involve the movement of air over their wings to achieve flight.

### Step 5: Correct the Statement
The corrected statement would be:
"Air helps in the movements of sailing yachts and gliders and also plays a crucial role in the flight of birds and aeroplanes."

### Final Answer
The original statement is **false**. The correct statement is: "Air helps in the movements of sailing yachts and gliders and also plays a crucial role in the flight of birds and aeroplanes."

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