A controlled experiment testing the effect of temperature on cricket chirps would involve manipulating the temperature while keeping other variables constant to isolate the effect of temperature on the chirping behavior of crickets.
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Recording observations at the same time every day: This aspect is important for consistency in measurements and helps reduce variability in chirp counts due to time of day. While it's a good practice in experimental design, it does not directly describe the setup of a controlled experiment regarding temperature manipulation.
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Using two kinds of heat lamps in tested containers: This is a more direct description of a controlled experiment. By using two kinds of heat lamps, you can create different temperature conditions while keeping everything else about the environment (like container type, humidity, light exposure, etc.) the same. This allows you to specifically test how changes in temperature affect cricket chirping.
In conclusion, the second option, "Using two kinds of heat lamps in tested containers," better describes a controlled experiment testing the effect of temperature on cricket chirps.