Copyright
Copyright is the legal right to a piece of work that you make whether it be a poem, book, song and so on. Copyright lasts the whole duration of the artists life and then 70 years after in the United Kingdom and United States, however certain things such as photographs only have copyright over them for 25 years.
Trademark
A trademark is a signature or a recognizable symbol/design which represents or identifies a company.A trademark doesn't necessarily belong to a business organization, it could also be a single individual if they designed themselves. In business companies for example you will that there trademark will be on everything (all the products)
Intellectual property
Intellectual property covers the side of plagiarism. Plagiarism is when you take somebody else work and pass it off or claim it to be your own. An example of this could be downloading songs of the internet and sharing them with others on the website.