Question

1. indica la pregunta investigable mejor formulada:

¿la electricidad es interesante?
¿qué opinas del transporte público?
¿cómo afecta la distancia al altavoz el nivel de sonido (db)?
¿cuánta luz debería haber en mi cuarto?

Explanation:

To determine the best - formulated research question, we analyze each option:

1. The question “¿La electricidad es interesante?” is a subjective question about personal interest and cannot be investigated in a scientific or research - based way as it lacks a measurable or testable component.
2. The question “¿Qué opinas del transporte público?” is also a question about personal opinion. It does not have a clear research - able objective as it is focused on individual viewpoints rather than a phenomenon that can be studied or measured.
3. The question “¿Cómo afecta la distancia al altavoz el nivel de sonido (dB)?” is a research - able question. The level of sound (measured in dB) can be objectively measured, and the distance to the speaker is a variable that can be controlled and manipulated. This question can be investigated through experiments, data collection, and analysis.
4. The question “¿Cuánta luz debería haber en mi cuarto?” is a subjective question about a personal preference for the amount of light in a room. It does not have a clear research - able objective as it is based on personal taste rather than a measurable or testable phenomenon.

Answer:

The best - formulated research question is "¿Cómo afecta la distancia al altavoz el nivel de sonido (dB)?"