What are the most important
social groups of sri lanka?

The most important groups of  Sri Lanka are as given below :

(i) Sinhala speaking

(ii) Tamil speaking

Explanation: The two main social groups in Sri Lanka are:

• Sinhala-speakers - 74%

• Tamil-speakers - 18 %. Among Tamils there are two subgroups;

• Tamil natives or the ‘Sri Lankan Tamils’ - 13 %.

• ‘Indian Tamils’- 87 % of the Tamil-speakers. Their forefathers came from India as plantation workers during colonial period.

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explanation:

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.