Transhumance is related to

Transhumance is the seasonal, cyclical movement of pastoral people together with their livestock between two fixed grazing grounds — typically a highland or mountain pasture used in summer and a lowland or plain pasture used in winter — undertaken to access fresh fodder and a favourable climate through the year.

Among the given choices, only movement of people captures this migratory character of transhumance: herding communities, such as the Gujjars and Bakarwals of Jammu and Kashmir or the Gaddis of Himachal Pradesh, physically move themselves and their herds between pastures each season.

• A closely built area of houses describes a compact (nucleated) settlement — houses clustered tightly together at one place — a fixed pattern of habitation, the opposite of the mobile, seasonal practice of transhumance.

• Artificial enclosures for keeping small house plants describes a terrarium — a small enclosed container for growing ornamental plants indoors — which has nothing to do with pastoral movement.

• Places where settlements develop describes the site of a settlement — a locational factor for where people build permanently, not a seasonal migratory pattern.

So transhumance is correctly identified as movement of people, together with their livestock, between seasonal pastures.