Question

i. We must
to avoid wasting electricity.​

Answer 1

yes it is must to avoid wasting electricity because the production of coal is low nowadays

Answer 2

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$\huge\rm\pink{Answer}$$\huge\rm\red{is:-}$

we must avoid wasting electricity because We should not waste electricity because it is produced from coal and petroleum and these sources are non renewable source of energy. ... By wasting electricity we are also depleting the resources for the future generation.