If sail boats a and b are approaching each other with the wind on different sides why is vessel a considered the give way vessel?

In sailing, when two vessels are approaching each other and the wind is on different sides, the vessel on the starboard tack (wind coming over the right side) has the right of way. If vessel A is on a port tack (wind on the left side) while vessel B is on a starboard tack, vessel A must give way to vessel B. This rule is part of the International Regulations for Preventing Collisions at Sea (COLREGs) to ensure safety and prevent collisions.