The golden rules of contour lines include the following: contour lines never cross, the closer the contour lines, the steeper the slope, and tops of hills and mountains are marked with closed circles.

c

explanation:

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.