What type of window has hinges on the bottom and opens inward toward the living space?

The type of window that has hinges at the bottom and opens inward toward the living space is the hopper window. Hopper windows are designed primarily for ventilation and are often found in basements or as small accent windows in various parts of a home. They are particularly useful in spaces where you want to limit the intrusion of outside elements while still allowing fresh air to circulate.

In contrast, sash windows are constructed with a design that allows for vertical sliding but do not typically open inward. Slider windows operate by sliding horizontally rather than swinging open. Casement windows, which are hinged on one side, open outward rather than inward, which differentiates them from hopper windows. Therefore, the mechanical design and functionality of a hopper window make it the correct answer to this question.