A student is designing an investigation to determine factors that affect homeostasis for the fish shown here. The student measures several variables with regard to the fish in an aquarium. Which variable, when changed, would MOST LIKELY have an effect on the
concentration of the urine produced by the fish?

solvent

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evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.