A student studies the gathering of frogs at the end of a pond, and has made the following notes in her lab book. Which of these is a CONCLUSION?

A)
The frogs are all of the same appearance.

B)
The frogs are attracted to the warmth of the sun.

C)
The shadier end of the pond has fewer frogs than the sunny end does.

D)
There are five times as many frogs at one end of the pond as at the other.

B) The frogs are attracted to the warmth of the sun.

Explanation:

Choices A, C, and D are all observations. Choice A tells the student the color/look of the frogs.  Choice C tells the student that the darker end of the pond has less frogs than the lighter end and choice D supports choice C with numerals.

Choice B on the other hand, is a different observation.  The difference is that with the others, you can notice the observations right off the back, but for the student to know that the frogs are drawn to the sun, the student must experiment or wait to record this.  This end recording is also called a conclusion.

I hope this helped !

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.

The answer is d- principle of faunal succession.