Final answer:
The clauses of concession in the student's examples are introduced by the words 'although', 'even though', 'though', 'while', and 'whereas', each setting up a contrast with the main idea of the sentence.
Step-by-step explanation:
The student's question involves identifying the clause of concession in several sentences. A concession clause expresses a contrast between two ideas or acknowledges a fact that might argue against the main point. The following are the clauses of concession identified in each sentence provided by the student:
- Although it rained, they enjoyed their walk.
- Even though I was full, I couldn't stop eating.
- I enjoyed the meal, though it was expensive.
- Harry, while he was almost crying from the pain, decided to finish the race.
- Joseph was very popular, whereas his brother had more enemies than friends.
The words although, even though, though, while, and whereas are used to introduce the concessive clauses in these sentences.