Atranscription factor or sigma factor binds to dna at the promoter.
a. initiation
b. elongation
c. termination

The correct answer will be option-A.

Explanation:

The transcription of bacteria is divided into three stages: initiation, elongation and termination.

The transcription process initiates when a specificity factor of RNA polymerase enzyme called sigma factor binds the promoter region of the DNA. The sigma factor ensures the binding of the RNA polymerase enzyme to the promoter region at the start site. After the transcription process starts, the sigma factor falls of the strand and enzyme transcript the DNA to RNA.

Thus, option-A is the correct answer.

the correct answer is d

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.