which part of a molecule does sunlight excite?\na neutron\nb proton\nc electron\nd none of the above

Brief Explanations:

Sunlight is a form of electromagnetic radiation. When it interacts with a molecule, it can transfer energy to electrons in the molecule, causing them to move to higher - energy states (become 'excited'). Neutrons and protons are in the nucleus and are not directly affected by sunlight in this way.

Answer:

C. electron