Question

what do you mean by oral presentation suggest measures to develop effective presentation skill​

Answer 1

1. Practice
2. Transform Nervous Energy Into Enthusiasm
3. Attend Other Presentations.
4. Arrive Early. 
5. Adjust to Your Surroundings. 
6. Meet and Greet. 
7. Use Positive Visualization
8. Remember That Most Audiences Are Sympathetic.

Answer 2

Oral prevention means take care of your mouth

The prevention can

1. Don't eat more chocolates

2. Don'T eat acidic food