When water moves into a cell, the solution surrounding it must be

I believe the answer is hypertonic solution.

When water makes it way into a cell, that cell is in hypertonic solution. Hypertonic solution contains dissolved particles- examples are the following: salt and electrolytes.

Hope this helps! :)

b is the correct answer

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.