Which of the following instruments is not used in measuring abiotic factors in a habitat?

Step 1: Analyze the question We need the instrument that is NOT used to measure abiotic (non-living) factors in a habitat.

Step 2: Concept Abiotic factors are the non-living components of an environment, such as temperature, humidity, wind direction and speed, light, rainfall, and soil pH.

Step 3: Check each option

• A. Microscope: It magnifies tiny objects such as cells and microorganisms. It does not measure any abiotic factor. It is used to study living things (biotic).
• B. Wind vane: It shows wind direction, which is an abiotic factor.
• C. Thermometer: It measures temperature, which is an abiotic factor.
• D. Hygrometer: It measures humidity (moisture in the air), which is an abiotic factor.

Step 4: Answer The microscope is the only instrument that does not measure an abiotic factor.

Tip: Link each instrument to what it measures:

• Thermometer → temperature
• Hygrometer → humidity
• Wind vane → wind direction
• Anemometer → wind speed
• Rain gauge → rainfall
• Barometer → air pressure

The odd one out is the instrument that studies living organisms, not environmental conditions.