While expressions, voice modulation, and body movement can enhance your oral communication, they are not essential for every presentation or communication situation. It is possible to communicate effectively without these delivery skills, but it may require additional effort and preparation. However, it is important to note that these skills can also help you convey your message more effectively and connect with your audience. They can help you emphasise important points, demonstrate your enthusiasm and confidence, and make your message more engaging and memorable. If you feel uncomfortable using these delivery skills, it may be helpful to practice them in a low-stakes setting such as with a friend or in front of a mirror. This can help you become more comfortable and natural with these skills. It is also important to remember that being authentic is crucial in oral communication. You don't need to adopt a particular style or mannerism that doesn't feel natural to you. Instead, focus on finding a delivery style that works for you and allows you to communicate your message effectively while still being true to yourself. Ultimately, the goal of effective communication is to connect with your audience and deliver your message in a way that resonates with them. Finding a balance between being authentic and using delivery skills that enhance your message can help you achieve that goal.