How many members are there in the House of Representatives?

The House of Representatives, as established by the U.S. Constitution, consists of 435 members. This number is based on the population of the states, with each state's representation determined by its population relative to others. The allocation of seats is reassessed every ten years following the census, which can lead to changes in how many representatives each state has, but the total number of representatives remains fixed at 435.

The other options reflect incorrect counts. For example, 100 is the number of senators in the U.S. Senate, not representatives. The figure of 250 is not representative of any official governmental body. Lastly, 600 also does not correspond to the established count of any congressional body. Understanding these distinctions is essential when considering how the legislative branch is structured.