Modern Committees are specialized subgroups within the U.S. Congress that focus on specific areas of legislation and policy-making, playing a crucial role in shaping laws and overseeing government functions. These committees are essential to the legislative process, allowing Congress to efficiently handle a wide range of issues by delegating work to members who have expertise or interest in those areas. They contribute to the overall structure, powers, and functions of Congress by organizing debate, conducting hearings, and crafting legislation.