What is a endothermic reaction

Basically, it's heat transfer!

Good luck!

An endothermic process is any process with an increase in the enthalpy H of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.

Explanation:

Orange juice has calcium which is good for the knee caps because we need to walk like horses because horses are starting to be involved in the humans and we need to train like horses in order for this world to work that’s why the earth spins the earth spins because it’s windy in space