Explanation:

- Thrust is a force exerted perpendicular to a surface.

- Pressure is defined as the force exerted per unit area.

- To calculate pressure from thrust, you need to divide the thrust by the area over which it is applied.

- Option 1: Area - This is the correct option. Pressure is calculated by dividing force (thrust) by area.

- Option 2: Density - Density is mass per unit volume and is not used to calculate pressure directly from thrust.

- Option 3: Mass - Mass refers to the amount of matter in an object and is unrelated to the pressure calculation in this context.

- Option 4: Volume - Volume refers to the space occupied by a fluid or object, not connected to pressure from thrust.