Answer:
B) The frogs are attracted to the warmth of the sun.
Step-by-step 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 !