Final answer:
In a photovoltaic (PV) cell, electrons are released from the "p-type" layer and transferred to the "n-type" layer, thus initiating an electrical current.
Step-by-step explanation:
In a photovoltaic (PV) cell, electrons are released from the "p-type" layer and transferred to the "n-type" layer, thus initiating an electrical current.
The release of electrons is made possible by the creation of electron-hole pairs due to the absorption of photons. When photons with sufficient energy strike the PV cell, the photons transfer their energy to electrons in the p-type layer, allowing these electrons to move to the n-type layer and contribute to the electrical current.
Therefore, the correct answer is a) Electrons.