if gas particles start colliding with the walls of their metallic container with increased force, what is…

Answer:

B. higher gas pressure

Explanation:

Step1: Recall pressure - force relationship

Pressure is force per unit area ($P = \frac{F}{A}$).

Step2: Analyze gas - container situation

When gas particles collide with container walls with increased force ($F$ increases), and assuming area ($A$) of the container walls remains constant.

Step3: Determine the effect on pressure

Based on $P=\frac{F}{A}$, as $F$ increases and $A$ is constant, pressure $P$ increases. So higher gas pressure is the direct effect.