Of the options you provided, re-absorption of water is not a direct function of the verebrate liver.
this is done by the excretory & urinary systems - mostly by large intestine to be more exact. The kidneys also play a role in water re-absorption, but they don't play as a significant of a role as the large intestines, which usues many many villi to re-absorb water beofre it's lost during excretion.
Im pretty sure its chemical energy because there also non renewable
Exercise that builds muscle mass can help burn more calories and promote the loss of body fat.
The complete lunar cycle is New Moon, Waxing Crescent Moon, First Quarter Moon, Waxing Gibbous Moon, Full Moon, Waning Gibbous Moon, Third Quarter Moon, First Quarter Moon, Waning Crescent Moon. The cycle ends where it began, with the New Moon.