The plants trap ....... energy and convert it into ....... energy.
Photoautotrophs: These are green plants, some protists and certain bacteria. They, with the help of their chlorophyll, entrap the light energy of the sun and change it into the chemical energy of a simple carbohydrate, glucose, produced by them from simple inorganic compounds, namely, carbon dioxide and water. The process is called photosynthesis.
So, the correct answer is 'Light, chemical'.