What is one factor that limited industrial expansion in the south

lack of an educated work force

Explanation:

Northern industries had workers educated for industrial activities. Operating machines, running factories, being a mechanic, a plumber, among other positions that are necessary for the industrial sector, requires some study and preparation. It was just those missing points in the southern United States. Education in the south did not train individuals ready for industrial work and this prevented the advance of the industrial sector in the south.

covert: hidden or secret

candid: truthful and straightforward

what i get from these phrases is covert means undercover or underground and that's where the flower is in april. on the other hand, may is the month where flowers start to bloom and thats the reason why candid is being used as a word to describe the blossoming period of a flower.

hope this answer you.