428. As shown in figure 2, fresh air entering through windward doorways and portholes while pushing heat and smoke out leeward doorways and portholes is known as _________

Horizontal ventilation is correct; the figure illustrates wind-driven fresh air entering windward openings and smoke exiting leeward openings at the same deck level, which defines horizontal ventilation. Vertical ventilation uses overhead openings, while loop ventilation and cross-flow induction are not standard tactical terms for this wind-driven, side-to-side smoke removal.