Techniques for presenting answers in a logical and coherent manner for the Physics optional subject:

1. Understand the question:
Before presenting your answer, it is crucial to understand the question thoroughly. Read it multiple times and identify the key points or keywords that will guide your response. This will help you structure your answer effectively.

2. Plan your answer:
Once you have understood the question, spend a few minutes planning your answer. Outline the main points you want to include and the order in which you will present them. This will ensure a logical flow in your response.

3. Introduction:
Begin your answer with a concise introduction that provides an overview of the topic. This will set the context for your answer and give the examiner an idea of what to expect.

4. Use headings and subheadings:
Breaking your answer into headings and subheadings not only makes it visually appealing but also helps in organizing your thoughts. Use HTML bullet points and tag to identify all headers and key pointers in your response.

5. Provide clear explanations:
When presenting your answer, ensure that your explanations are clear and concise. Avoid using technical jargon unless necessary, and explain any complex concepts in a simplified manner. Use examples or diagrams to illustrate your points wherever possible.

6. Use logical reasoning:
Present your arguments in a logical and coherent manner. Use deductive or inductive reasoning to support your statements. Ensure that there is a clear connection between different points in your answer.

7. Address counterarguments:
Acknowledge and address any counterarguments or alternative viewpoints related to the question. This shows that you have considered multiple perspectives and strengthens the coherence of your answer.

8. Conclude effectively:
End your answer with a concise conclusion that summarizes the main points discussed. It should provide a logical end to your response and leave a lasting impression on the examiner.

9. Proofread your answer:
Before submitting your answer, take some time to proofread it for any grammatical or spelling errors. This will ensure that your response is coherent and professional.

By following these techniques, you can present your answers in a logical and coherent manner for the Physics optional subject. Remember to practice writing answers within the word limit to improve your time management skills during the actual examination.