The circuit you uploaded is a combination circuit, which contains both series and parallel components. Here’s the breakdown:

1. The top portion of the circuit (with resistors labeled $R_2$ and $R_3$) is a parallel circuit. These two resistors are connected side by side, with current splitting between them.
2. The resistor at the bottom, $R_1$, is in series with the parallel combination of $R_2$ and $R_3$, as the current must flow through $R_1$ before it divides into the two parallel branches.

Thus, the circuit is neither purely series nor purely parallel but rather a series-parallel circuit.

Would you like details on how to calculate the equivalent resistance or the current in this circuit?

Here are some relative questions:

1. How do you calculate the total resistance in a series-parallel circuit?
2. What is the formula for the current distribution in a parallel branch?
3. How can Ohm's Law be applied to analyze this circuit?
4. What would happen if you added another resistor in parallel to $R_2$ and $R_3$?
5. How does the total resistance change if you increase $R_1$?

Tip: In series circuits, current stays the same across components, while in parallel circuits, the voltage across each branch remains the same.