Final answer:
Auditors aim for reasonable assurance due to the limitations in financial reporting, inherent risks in audit processes, the nature of audit evidence, and financial transactions' complexity.
Step-by-step explanation:
The auditor aims for a reasonable level of assurance rather than absolute certainty when evaluating the accuracy of financial statements due to several significant factors. These factors include the limitations of financial reporting, the inherent risk in audit processes, the nature of audit evidence, and the complexity of financial transactions. Complete certainty is impractical because the audit process involves judgment and estimation, which are subject to limitations and potential inaccuracies. Furthermore, the possibility of fraud or error, despite the best efforts of auditing, can never be entirely eliminated, leading to an acceptance of a reasonable, but not absolute, assurance level in the final audit report.