The only example listed that one can really describe as the DIRECT conversion of solar energy into chemical is:
C. the bean plant making its own food grow.
Concept:
Seeds wait to germinate till 3 desires are fulfilled:
Water, correct temperature, and a decent location such as in soil.
Throughout its early stages of growth, the spermatophyte depends upon the food provides hold on with it within the seed till it's giant enough for its own leaves to start creating food through the chemical change.