Question

How did the squirrel show the monkey that his work was also important

Answer 1

Monkeys were helping Lord Rama to build a bridge over the sea. ... The work of the squirrel was as important as the monkey's work.

Answer 2

When the Monkeys were helping in building the bridge for Lord Rama, then they observed that squirrels were also helping with small stones or pebbles.

They started to make fun of them.

However, Lord Rama was impressed with the devotion squirrels were showing towards him for which he appreciated them.