I believe the answer you are looking for has to do with cells, they are the basic building block of life and are the smallest life that can support itself.
It would be B. Less force is needed to move up the ramp
The answer is A. Environmental conditions are not always right to produce flowers and seeds for sexual reproduction.
Most plants are able to reproduce either way because even if the conditions aren't right for the plant, it can still make more flowers so it doesn't die out.
I hope this helps! :D
Mitosis:Two diploid cells with identical genetic information
MeiosisFour haploid cells with different genetic information.