What land condition corresponds to Beaufort Scale Level 0?

The Beaufort Scale is a system for estimating wind speed based on observed sea conditions or land features. At Level 0 of the Beaufort Scale, referred to as "Calm," there is essentially no significant movement of the air. This condition is characterized by smooth surfaces on water with no waves and no visible effects of the wind.

Choosing "Calm seas" accurately reflects the absence of wind effects, making it the correct association with Beaufort Scale Level 0. The other options describe conditions where there is still some wind presence, implying movement. "Small waves," "Leaves rustle," and "Wind felt on the face" indicate that the wind is strong enough to create observable effects, such as water disturbance or movement in foliage, which do not apply at this calm level. Thus, Level 0 is specifically defined by the complete lack of wind disturbance, represented by calm seas.