Question

which fuel is most likely to release sulfur oxides when burned? tidal power biomass coal solar energy

Explanation:

Tidal power and solar energy are renewable energy sources that do not involve combustion and thus do not release sulfur oxides. Biomass combustion can release some sulfur, but coal is a fossil fuel with relatively high sulfur content. When coal burns, sulfur in it reacts with oxygen to form sulfur oxides ($\ce{S + O_{2}\xlongequal{点燃}SO_{2}}$).

Answer:

coal