Where does the energy come from that is needed for an endothermic reaction

Answer : For an endothermic reaction the energy come from the surroundings.

Explanation :

Endothermic reaction : It is a type of chemical reaction in which the energy is absorbed by the surroundings. In this reaction, the energy of reactants are less than the energy of products.  The energy of reactant is greater than the energy of product.

Exothermic reaction : It is a type of chemical reaction in which the energy is released into the surroundings. In this reaction, the energy of reactants are more than the energy of products. The energy of product is greater than the energy of reactant.

Hence, the energy come from the surroundings that is needed for an endothermic reaction.

d.) circle motion requires a force to give it a centripetal acceleration.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock