Answer:
1) the genes and chromosomes do not double after each generations because parental sex cells are haploid and only contain one set of chromosomes. During fertilization the two cells fuse to form a diploid zygote with two copies of genes and chromosomes. For example a normal human has 46 chromosomes (2 copies of 23 chromosomes) during reproduction gametes which contain 23 chromosomes (haploid) fuse to form an offspring with the correct number of chromosomes ( 23 + 23 = 46).
2) offspring only receive one set of chromosomes from each parent so to maintain the chromosome number of humans. If this did not happen you would not be the same species.
The answer is either b or c because bio means life and diversity means different and the ants stinging other insects get rid of a population and maybe another species lives off of the species that ant killed.
When the grasslands are converted into housing projects it gets rid of everything so no trees no animals and no diversity of living organisms other than humans