$(a)$ Why do parents immunize their newborn babies?
$(b)$ What are the ways to prevent mosquitoes from breeding?

(N/A) Parents immunize newborn babies to protect them from deadly infectious diseases by providing immunity through the administration of specific vaccines.
$(b)$ Ways to prevent mosquitoes from breeding include:
$1$. Do not allow water to stagnate in surroundings,as stagnant water is a breeding ground for mosquitoes.
$2$. Clean water coolers,flower pots,and tanks regularly.
$3$. Maintain swimming pools with proper care and use appropriate chemicals to prevent larval growth.