Which of the following describes an endothermic reaction? a. wood burns in a campfire. b. the shell of an egg breaks when dropped. c. a balloon stretches as air is blown into it. d. batter becomes a pancake when heated.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.