The principle that allows insurers to predict losses more accurately as the number of similar exposure units increases is known as:

Explanation

The law of large numbers states that as the number of similar, independent exposure units grows, the actual loss experience will more closely approach the predicted (expected) experience, letting the insurer set accurate rates. Adverse selection is the tendency of higher-risk applicants to seek coverage more than lower-risk ones. Indemnity is the concept of restoring an insured to their pre-loss financial condition (and does not apply to life insurance, which is a valued contract). Subrogation is an insurer's right to recover a paid claim from a responsible third party.