Answer:
Equity.
Step-by-step explanation:
Equity can be defined as a quality of being fair and impartial.
In economic terms, the term equity is defined as the distribution of benefits according to the contribution made by each person.
In the given case, uncle has made a task list and according to this the one who will do more tasks will receive accordingly. This means that there will be no unfairness or partiality in the distribution of benefits among his nieces.
So, the correct answer is equity.