Why all women have broad posterior region espcially those in hips region?asap!

Because they are genetically already ready for birthing. This is just something that has over time formed and spread to all women because from birth they are expected and ready to produce more offspring almost like their 'job'.

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).