Here's a breakdown:

* Endergonic reactions require an input of energy to proceed. Think of them like uphill climbs; you need to put in effort (energy) to go up.

* The change in Gibbs free energy (ΔG) is positive for endergonic reactions. This means the products have more free energy than the reactants.

* Examples of endergonic reactions: Photosynthesis, protein synthesis, muscle contraction.

Let me know if you'd like more details or have any other questions!