Whole life is the original permanent policy. The premium is calculated at issue to keep the policy in force to a very old age, and it does not change; part of each premium covers the cost of insuring you that year and part is set aside to build cash value, which is why the premium is high in the early years compared with term. The death benefit is fixed, and the cash value follows a table in the contract that the carrier is bound to.
Mutual carriers add dividends on participating policies, paid from surplus when the carrier's investment returns, claims and expenses come in better than its pricing assumed. Dividends are not a guarantee, but they can be taken in cash, used to reduce the premium, left to earn interest, or used to buy paid-up additions, small slices of extra paid-up insurance that raise both the death benefit and the cash value over time. The illustration shows the guaranteed minimum values and a projection with dividends at the current scale, and the two diverge over decades.
The premium is set from age, sex, rate class and the amount, and, because it is level for life, from how many years of payment are chosen: ordinary whole life is paid to a late age, limited-pay versions are paid over ten or twenty years or to a set age, and single-premium versions are paid once. Shorter payment periods mean a larger annual premium for a policy that is paid up sooner.
The analysis sizes the permanent need separately from the temporary one, prices whole life against term and against indexed universal life for that amount, and reads the illustration column by column. For a household that has not yet bought enough term or funded its retirement accounts, the usual recommendation is to do those first.