Answer:
Will decrease the current through the circuit
Step-by-step explanation:
The circuit consists of a battery and a resistor. The voltage and the current through the circuit are related by Ohm's law:

where
V is the voltage of the battery
R is the resistance of the resistor
I is the current through the circuit
The battery in the circuit does not change, so it always provides the same voltage: this means that V is kept constant. Therefore, there is a relationship of inverse proportionality between the current I and the resistance R. This means that if the resistance of the resistor is increased, then the current in the circuit, I, will decrease.