Add punctuation: Your blood oxygen level is a measurement how much oxygen is reaching your muscles
A: Your blood oxygen level is a measurement how much oxygen is reaching your muscles.

Add punctuation: The reasons for all data loss scenarios related to loss of photo audio and video files are explained below
A: The reasons for all data loss scenarios related to loss of photo, audio and video files are explained below:

Add punctuation: It has Very much A lot space 2 separate bedrooms and 2 baths
A:
It has Very much A lot space, 2 separate bedrooms, and 2 baths.