The person affected may have some difficulty performing simple functions like walking, listening, and seeing. (lactationconsultantresources.com)
This causes the body to work harder to perform simple functions, which can lead to a host of health problems. (progressivehealth.com)
To start with, the remote control is easy to use and very intuitive, with simple functions that will have your drone in the air quickly and easily. (geekwrapped.com)