For a defined benefit pension plan, the primary driver for ESG investment is most likely:

Fordefined benefit pension plans, the key priority is tomeet future obligations to beneficiaries—which is afiduciary duty. CFA materials emphasize that thislong-term dutyincreasingly requires considering ESG risks and opportunities, as these can materially affect financial performance and liabilities over decades. While reputational and ethical factors may play a role, the ultimate driver is thefiduciary obligation to secure retirement benefits.