Question

which of the following best completes the hypothesis? increasing the salt concentration in a solution... a. will not have an effect. b. makes the solution taste saltier. c. may be harmful or helpful. d. will decrease the amount of bacteria in the solution.

Explanation:

In a scientific context related to solutions and their properties, increasing salt - concentration can act as a preservative by creating an osmotic environment that is inhospitable to bacteria. Option A is too general and not a typical scientific hypothesis about salt - concentration effects. Option B is more of a sensory observation rather than a scientific hypothesis about the impact on the solution's properties related to its composition. Option C is very vague. Option D is a well - formulated scientific hypothesis about the impact of salt concentration on the biological content (bacteria) in a solution.

Answer:

D. will decrease the amount of bacteria in the solution.