Endothermic Reaction Energy Profile Steps:

• Recognize the reaction as endothermic, absorbing energy from lightning.
• Recall that endothermic reactions have products at higher energy than reactants (ΔH > 0).
• Identify diagrams showing reactant energy lower than product energy with an activation energy barrier.
• Select the diagram matching this profile, which is D.

Why D is correct:

• It depicts products higher in energy than reactants, consistent with the endothermic definition where ΔH = E_products - E_reactants > 0.

Why the others are wrong:

• A shows products lower than reactants, indicating an exothermic reaction.
• B lacks an activation energy barrier, violating transition state theory.
• C shows equal reactant and product energies, implying ΔH = 0 for a thermoneutral process.

Final answer: D