Final answer:
The best transitional phrase to use in the given sentence is 'for example,' as it ties the general claim about learning teamwork to the specific instance of a ropes course requiring teamwork. The correct option is 3.
Step-by-step explanation:
The sentence provided by the student is connecting two ideas that demonstrate teamwork as part of the learning experience. The best transitional phrase for combining these ideas is “For example,” as it introduces an instance that illustrates the previous statement.
The full sentence should read: “The brochure stated that students will learn teamwork; for example, a ropes course requires students to work together to form a bridge for a classmate to cross.” This transition effectively ties the general claim about teamwork to a specific activity that demonstrates it. The correct option is 3.