Using your knowledge of activators and repressors hypothesize two ways in which transcription of the ct gene?

The transcription of the lct gene can be blocked by two kinds of mechanism.

Explanation:

The question is incomplete, here is the complete version of the question

Using your knowledge of activators and repressors, hypothesize two ways in which transcription of the LCT gene  could be turned off.

The transcprition of lct gene could be turned off by the action of a particular repressor protein that can interact with transcription mechanism of the gene by blocking the start site of transcription (TATA box, for instance). Or also, by some other protein that can interact with the activation region of the gene that way blocking the transcription of the gene.

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).