Which item is included in the definition of comprehensive income?

Comprehensive income is defined as the total change in equity for a period from nonowner sources. This includes all items that affect equity, except for transactions with owners, such as contributions and distributions, which are considered owner-related activities.

The correct choice highlights that comprehensive income encompasses all changes resulting from nonowner sources, which means it includes not only net income but also other comprehensive income items, such as unrealized gains and losses on certain investments, foreign currency translation adjustments, and certain pension adjustments. These elements reflect the overall economic performance of an entity beyond just those in the income statement.

Realized gains from sales, changes in cash flow, and dividends paid do not fully align with the concept of comprehensive income. Realized gains pertain only to completed transactions, changes in cash flow are a liquidity measure rather than a component of equity changes, and dividends represent distributions to owners, which are excluded from comprehensive income calculations.