Jill also orders a to keep her legs properly positioned.

Jill also orders a "Footrest" to help keep her legs properly positioned.

Usually people who are working in an office or spend most of their time on front of a computer screen complain about  back ache etc. a reason is that their legs are not positioned properly which causes strain and aches in the body. A footrest helps that position to maintain a proper posture avoiding pain etc.

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.

From inward to outward, the layers are: the core, the radiative zone, and the convection zone.

i hope this helps :)