In a series circuit, the correct description is:
There is only one path the electrons can take through the circuit, and they must pass through all circuit components.
In a series configuration, all components (such as resistors, light bulbs, etc.) are connected end-to-end in a single path. This means that the current that flows through the circuit must pass through each component consecutively. If any component in a series circuit fails or is disconnected, the entire circuit becomes open, and the current stops flowing.
The second statement describes a parallel circuit, where there are multiple paths for electrons to take, and components can be bypassed.