The correct answer to this open question is the following.
Although there are no options attached or further reference and context, we can answer in the following general terms.
Why is there suffering and what can we do to end suffering?
Answer:
Suffering is the human emotions that result after humans realized they did something bad, wrong, or badly affected another individual. suffering is the emotion humans feel after they find no explanation about how things happened or why something resulted different than expectations.
Indeed there are many reasons for suffering. It also includes the guilt humans feel when they know that they did something wrong and had consequences that cannot easily be forgotten.
One of the most simple ñalthough not easiest- ways to end suffering is to acknowledge the role we have in producing that suffering. If we did something wrong, acknowledge it and ask for forgiveness. If we said a lie, acknowledge and ask for forgiveness. We ask for forgiveness in an open and sincere way and commit ourselves to not repeat that conduct in the future.