I believe the answer is metabolism...
Answer:
B
Explanation:
Crossing over is the process involved during meiosis of two chromosomes sharing genetic information with each other from each parent. This happens so the two daughter cells or sister chromatids have a variety of genetic information and so they are not completely identical. This leads to genetic diversity or variation.
As the flower takes water that it needs to survive, the dye in it has no more density so it goes up with the water dying everything in its path blue.