1. Modal verbs: The use of "can" in "Leaders can also encourage their staff" shows possibility and ability, which is common in spoken English for making suggestions.
2. Gerund phrases: Phrases like "offering training programs" and "letting employees take on new responsibilities" use gerunds as the object of the sentence, making the answer sound natural and fluent.
3. Conditional structure: "When people see that they can develop their skills and advance in their careers, they feel more motivated..." uses a first conditional structure to show the cause and effect relationship, which is a strong way to explain ideas in IELTS Speaking.
4. Parallel structure: The list "offering training programs, letting employees take on new responsibilities, or promoting from within" uses parallel structure, which makes the answer clear and easy to follow.