19. Which of these is an example of behavioral isolation? A. Two species of orchids have different flower structures.
B. Two species of meadowlark have different mating songs.
C. Two species of snakes live in the same area, but one species lives in the water and the other
lives on land.
D. Two species of birds share the same tree but live at different elevations.

The correct answer is B. Two species of meadowlark have different mating songs.

Explanation

Behavioral isolation is a term used in biology to refer to the absence of interbreeding between species of animals that have different courtship and mating rituals. An example of this phenomenon is evidenced in the sounds emitted by two different species of crickets since the females of each species are attracted only by the sounds of the males of their species. According to the above, the correct answer is B. Two species of meadowlark have different mating songs because females of one meadowlark specie is attracted only by the songs of male of her specie due to a reproductive behavior.

i am positive it is c. condensing but i may be wrong

i think it is dna, i'm not totally sure but i think it might be.