Which of the following is included in the district revenue?

The inclusion of legal restrictions on spending combined with all funding sources in district revenue is significant because it encapsulates the overall financial framework within which a school district operates. Understanding district revenue requires consideration of all available funding sources, including state funding, local taxes, and federal grants, as well as the restrictions imposed on these funds.

When revenue is analyzed, it's not just about the money that comes in but also how it can be utilized in compliance with legal and educational mandates. Legal restrictions can dictate how certain funds can be spent, influencing budgetary decisions and ensuring that the district adheres to regulations. This comprehensive approach to understanding revenue helps in assessing the financial health and operational capabilities of a school district.

In contrast, the other options represent only specific components of revenue without capturing the broader context. Local taxes might contribute significantly to revenue but do not encompass state and federal funding. Federal grants might be beneficial but are often limited in scope and tied to specific programs. Similarly, donations are valuable but do not constitute the overall revenue stream that a district operates under. Therefore, recognizing the legal framework in conjunction with diverse funding sources provides a clearer picture of the district's revenue landscape.