Identify an example of a parallel clause.

A parallel clause refers to a grammatical construction where two or more parts of a sentence are similar in structure, improving readability and rhythm. In the given examples, the correct choice showcases this characteristic clearly.

The option that illustrates a parallel clause effectively uses repetition of the structure "we shall fight" followed by different locations. This creates a rhythm that emphasizes determination and resilience. Each clause maintains the same grammatical format, which reinforces the idea being conveyed and contributes to the overall persuasive power of the statement. The repetition and parallel structure help emphasize the speaker's commitment to fighting in various situations, making it a stronger rhetorical choice.

Other options, while they contain compound elements, do not exhibit the same level of structural parallelism. For instance, in the first choice, the phrases describe different activities but do not follow a consistent grammatical format. Similarly, the other examples express ideas or actions that differ in structure, lacking that uniformity seen in the correct answer.