Which of the following atmospheric layer is termed as a weather layer?

Which of the following atmospheric layer is termed as a weather layer?

مندرجہ ذیل میں سے کس ماحول کی تہہ کو موسم کی تہہ کہا جاتا ہے؟
Explanation

Troposphere. Known as the lower atmosphere, almost all weather occurs in this region.