What does a manometer measure?

Amanometeris used to measurepressure, particularly in gases and liquids.

Step 1: Analysis of Each Option

Pressure (A):✅Correct. Manometers are commonly used in HVAC, industrial, and lab applications.

Volume (B):❌Incorrect. Volume is measured using flow meters or tanks.

Distance (C):❌Incorrect. Distance is measured using rulers or lasers.

Voltage (D):❌Incorrect. Voltage is measured using voltmeters.

Thus, the correct answer isA. Pressure.