In this solution, we will identify a direct service as part of a work$-$life initiative.

$2$

Let us first briefly discuss the main concept.

Work$-$life initiatives are aimed at bringing balance between an employee's professional and personal life to manage stress and sustain a healthy working environment.

$3$

Now, let us have a look at the given options.

a$.$ Onsite childcare refers to a system that enables organizations to run childcare centers in the office premises. The purpose is to provide a quality$-$driven, safe, and nominal provision for employees with children to raise and take care of their kids while they work.

This saves the employees from the stress of finding another creche that is not nearby and where it will be harder for the employees to keep a check on their children.

Therefore, this option is correct.

$4$

Options b$,$ c$,$ and d are incorrect because provisions of elder care resources, adoption assistance, and job sharing, even though helpful in general, do not specifically contribute to work$-$life balance by offering a direct support on the job.

$5$

e$.$ Providing direct financial assistance is purely monetary in nature, and does not include providing a wholesome environment for the employee where he can work stress$-$free with his family.

Therefore, this option is incorrect.

$6$

Based on the discussion, it is clear that the correct option is A$.$