Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to close a velux window [title] Push the top control bar upwards to close the ventilation flap. [step] Velux windows have a natural ventilation feature, where you pull the top control bar down 1 time to open the ventilation flap. The window can remain closed, or you can open it if you wish.

Ending1: The more you press the control bar downwards, the more you will force the window open. [substeps] In general, the lower the control flap rises at the top of the window, the larger the window will be when closed. Ending2: [title] Close any browser menus if needed. [step] Try to close all browser drop-down menus, or try to make sure that the tabs are all at the top (with blue thermometers on them). Ending3: [title] Then you can close the window to make sure no hazardous material is inside the window. [step] Also, it is advisable to close the window if there are any air leaks that could increase the likelihood of noises being heard from outside the window. Ending4: The ventilation flap simply lets air circulate through your home. To close the ventilation flap, place your hand around the control bar, and press it up gently 1 time.

Answer format: ending1/ending2/ending3/ending4