"Young learners, no doubt, are very investigative by nature. Whenever they come across a new thing or they hear about it, a number of questions hit their curious and tender mind. They want to know appropriate answers to their questions. They find their parents and guardians in their very environment from whom they can know whatever they require. It is the due responsibility of parents and guardians to give them satisfactory answers…"
Can anyone explain me the meaning and grammar of the bold part? I can't figure it out.
My friend said that the sentence in bold is grammatically correct, but it's for informal use.