ANS:A - electrical energy directly.

In a fuel cell, chemical energy is converted directly into electrical energy. Fuel cells operate through an electrochemical reaction where the reactants (typically hydrogen and oxygen) are supplied to the cell, and through an electrochemical process, they react to produce electricity, water, and heat. This process does not involve mechanical energy conversion, and the electrical energy generated is available for immediate use. Therefore, the correct option is: electrical energy directly.