How can one start a fire using rocks and sticks?

To start a fire using rocks and sticks, first gather dry tinder like leaves or small twigs. Use a sharp rock to create a small notch in a larger rock. Place the tinder in the notch. Rub a stick back and forth in the notch quickly to create friction and generate heat. Continue until the tinder ignites. Carefully blow on the ember to help it grow into a flame.