Final answer:
When selecting a sensor for a Labquest computer interface, you would use a pH sensor to measure and record pH levels at different sites as it is specifically designed for this type of measurement.
Step-by-step explanation:
To select the appropriate sensor for attachment to the Labquest computer interface, one should consider the type of data being measured and recorded.
For measuring parameters such as pH, temperature, conductivity, and dissolved oxygen, different sensors are required.
To measure and record pH levels at various sites, a pH sensor is the most suitable choice because it is specifically designed to measure the hydrogen ion concentration in a solution and provides a direct reading of pH value.
Temperature can be measured with a temperature sensor, conductivity with a conductivity sensor, and dissolved oxygen with a dissolved oxygen sensor.