To start your research paper on coral reefs, it's a good idea to begin with an introduction paragraph that captures the attention of your readers and provides them with an overview of the topic. A thesis statement is indeed required in research papers as it helps to establish the purpose and main argument of your paper.
Based on the information you have collected, here's an example of an introductory paragraph that includes a thesis statement:
Coral reefs, magnificent limestone formations built by tiny coral animals, are an essential component of our planet's marine ecosystems. These intricate structures, formed through the accumulation of coral polyps' limestone skeletons, serve as vital habitats for thousands of plant and animal species. Coral reefs provide numerous benefits to both humans and the environment, such as protecting shores, supporting diverse marine life, and contributing to economic activities like tourism. However, these precious ecosystems face severe threats from human activities, including pollution, overfishing, and rising ocean temperatures. This research paper aims to explore the importance of coral reefs, the environmental risks they encounter, and the necessary measures to conserve and protect these fragile ecosystems.
In this paragraph, the thesis statement is: "This research paper aims to explore the importance of coral reefs, the environmental risks they encounter, and the necessary measures to conserve and protect these fragile ecosystems."
Remember to use this thesis statement as a guide to structure your paper and ensure that you address the key points mentioned in your introduction throughout the subsequent sections of your research paper.