Final answer:
The indirect speech version of 'The mother asked her daughter not to waste her time on mobile' is 'The mother advised her daughter against wasting time on her mobile phone.'
Step-by-step explanation:
The indirect speech for the sentence 'The mother asked her daughter not to waste her time on mobile' would be:
The mother advised her daughter against wasting time on her mobile phone.
Indirect speech is a way of reporting what someone else has said without quoting them directly. Rather than quoting the mother's exact words, we convey the same message by reporting the purpose of what she said and the intended message to her daughter. Observing correct tense changes and pronoun adjustments is essential when converting from direct to indirect speech.