Which of the following describes Mendel's law of segregation? During DNA replication, the alleles separate into haploid daughter cells

Alleles of a trait can never be separated from each other.

During meiosis, the two alleles for a trait separate into different gametes

During meiosis, two alleles that were separated come back together

so whats the answer

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).