For the speaker:
1. Speak loud and clear, so that everyone in the room hears what you're saying.
2. Know your audience. Speak to them so that they understand what you are saying.
3. Exert confidence, making sure everyone knows you are sure of what you're saying, leaving no room for them to second guess what it is you said.
For the listener:
1. Be prepared to listen and understand.
2. Be respectful. No talking, eating or really doing anything really distracting while the speaker is speaking.
3. Look engaged when the speaker talks. Make it seem as if you are genuinely intrigued by what they are saying.
for blood and dna..........
Well this is more your opinion so I can't realy answer for you but I would agree strongly crimes comte by children under 18 are getting worse and more frequent.
Alright, so amongst starters, you have a few you can use to show you'll have evidence:
According to text
According to the passage
According to the information provided
As the information shows
As the text mentioned, (include direct quote here)
Based on the information in the passage/text, (include reasoning here)
Etc. There are quite a few options, really, these are just a few. Based on whatever you are providing the information ON, the words information, text, and passage can be changed to suit your needs, such as article, newspaper, website, etc.