For parallel structure, all elements in a list should have a similar form. In this case, 'researching' and 'practicing' are gerunds, so 'updating his résumé' is the appropriate response.

Parallelism requires maintaining the same verb form throughout similar points. In this case, 'researching' and 'experimenting' are gerund forms, making 'perfecting her culinary techniques' the right choice.

Parallelism requires the use of consistent verb forms. In this case, 'exercising' and 'eating' are gerunds, so the correct choice is 'getting enough sleep.'

When maintaining a parallel structure, all elements in a list should have a consistent form. Since 'groundbreaking research' and 'compelling presentations' are noun phrases, 'innovative thinking' is the correct answer.

In order to maintain parallelism, all components in a list should possess similar form. In this context, this list consists of gerund forms, so 'developing mental resilience' is accurate.