Question

what do u mean by "prevention of precocius reproductive development in the late growing season by vernalisation"?

Answer 1

Vernalization is the process by which flowering is induced in the plants by exposing them to low temperatures.
Precocious development means when flowering or fruiting in plants occur before the actual time or premature flowering. Vernalization prevents the precocious reproductive development (premature flowering/fruiting) in the late growing season; thereby, providing sufficient time to the plant to reach maturity.