'Raj leaves time at the end of his speech to answer questions from the audience.' This is the example which best shows how speeches can be interactive.
An interactive speech is much more likely to keep your audience's attention and build a relationship with them, and there are some simple ways to do this, from live polling to asking questions.
To make your speech more interactive:
Make eye contact
Ask the audience
Don't forget about your body language
Try to keep it as simple as you can.
Hence, the correct answer is 'Raj leaves time at the end of his speech to answer questions from the audience.'