The correct answer to this open question is the following.
If I had to make a speech on how to save dolphins, based on the context in "White Dolphin," written by Gill Lewis, I would have said the following.
Dear friends,
All lives on planet earth matter. Sealife is of the utmost importance to take care of nature. Sea species such as whales and dolphins represent great value for humans. Every country in the world has launched programs to protect dolphins and whales. Scientists have said that a dolphin's brain is the most similar to a human brain. So we can assume there is a special connection "humans-dolphins" that we have to understand yet.
Dredging and unresponsible fishing have killed hundreds of dolphins that are an important component of the sea ecosystem. And if all creatures on planet earth are sentient beings, we need to make our voices heard and demand our government officials to put a stop on those irresponsible practices that kill dolphins and other sea species.
We as humans -the conscious creatures on earth- have to set the example of harmonious living in this world, and the respect for dolphins must be a priority. If we do not take care of them, who will do it?
Thank you.