Compound sentence: Effective employee training is a key ingredient for excellent customer service. This sentence contains two clauses connected by the linking word "is", adding complexity to the sentence.
Parallel structure: Trained workers are not only more confident in handling various situations but also feel a greater sense of value and belonging within the company. This sentence uses parallel structure, connecting two actions, "more confident in handling" and "feel a greater sense of value", enhancing the expressiveness.
Past participle phrase: often leading to higher levels of satisfaction and engagement. Here, the past participle phrase "leading to" is used to describe the impact of employee training on satisfaction and engagement, adding complexity to the sentence.