Which sentence contains a nonrestrictive clause that is punctuated correctly?

 My boss—who was recently promoted again is great at motivating her employees. My boss, who was recently promoted again, is great at motivating her employees. My boss who was recently promoted again—is great at motivating her employees. My boss, who was recently promoted again is great at motivating, her employees.

Ascenario where we impact the environment is when humans/ us litter outside or in the ocean which causes wild life to die or even extinct and also if we keep cutting down our trees we might not even have oxygen to live humans also keep limiting water resources wasting it s