Final answer:
A litigation services practitioner's key responsibility among the provided options is to provide expert testimony in legal proceedings, interpreting and presenting complex technical or factual matters related to their area of expertise.
Step-by-step explanation:
The task of a litigation services practitioner includes many different roles, but out of the options presented, expert testimony is a key responsibility. A litigation services practitioner is someone who may be called upon to provide specialized knowledge to a court or tribunal concerning the factual elements of a case during legal proceedings.
They are not typically involved in mediation, arbitration, or issue identification as their primary role. Instead, their expertise is sought in interpreting and presenting complex technical or factual matters within their area of specialization, which can impact the outcome of a legal dispute.
This expert testimony assists judges and juries in understanding the intricacies of the case being litigated which falls in line with the objective to ensure that accessible and impartial dispute resolution is achieved.