are used in place of nouns referring to specific people or things, for example I, me, mine, you, yours, his, her, hers, we, they, or them.

are used to refer back to the subject of the clause in which they are used

 refer to something owned by the speaker or by someone or something previously mentioned

a defendant and his or her counsel

a person, company, etc., against whom a claim or charge is brought in a court

a member of the police force or a private investigator whose function is to obtain information and evidence, as of offenses against the law

a person who is the prisoner of someone who threatens to kill them if they do not get what they want

a lawyer whose job is to prove in court that someone accused of a crime is guilty

a person or persons charged in a court of law with a crime, offense

lawyer

someone who has committed a crime

someone who is in prison as punishment for a crime

someone who is keeping you as a prisoner

young people who have committed a crime or who are accused of committing a crime

a group of people, usually 12, who judge a court case.

someone whose profession is to provide people with legal advice and services

Second, we cannot foresee the distant future, so we ought to develop the capability to escape from the earth. Gradually, we are learning how humans can survive for long periods in space and even travel to other planets in the future. If space exploration is halted, this valuable knowledge will never be acquired. It is true that environmental destruction is also a serious issue, but it is also true that we remain dependent on our environment if we never accept the challenge of exploring other worlds.

There is an argument that exploring space is a waste of money and that there are more urgent needs to be addressed on earth, such as reducing poverty and preventing environmental destruction. However, I completely disagree with this opinion for two reasons.

In conclusion, while we undoubtedly face serious problems on our own planet, it is imperative that we continue to explore space. This will promote further technological advances as well as provide a possible means of escape should earth become uninhabitable in future. Ideally, all nations should cooperate in the advancement of space research.

First of all, many of the technologies we take for granted today were originated thanks to space research. Take satellite technology, for example, which we depend on for broadcasting and weather forecasting. Without satellites, we would not be able to follow global events as they happen, nor give populations any warning of approaching storms. Space research has also led to the development of new lightweight materials that offer us heat protection and enable food preservation. Therefore, the challenge of sending human beings into space has often driven the development of new technologies that benefit our everyday lives.

This part serves as the opportunity to grab reader's attention using catchy way of introducing chosen topic.

One or two sentences that state the main claim and reasons that allow its expansion.

This is the easiest part of almost finished opinion essay if all sections above are followed properly.