Hello. You did not enter the text to which this question refers, which makes it impossible for it to be answered. However, I will try to help you in the best possible way.
The main idea of a text is the main subject that the text addresses, the subject on which all the arguments presented are based. You will be able to understand this idea by reading the full text and identifying what the text is about. In this case, the key sentence of the text is the sentence that presents this subject in the most direct way possible. Generally, the main idea and the key sentence of the text are presented in the first paragraphs.
To develop the main idea, the text presents details, which are sentences that support this idea, showing how it is relevant and why it is true. These details are present throughout the text.
Pollution interferes with the functioning of body systems, allowing malefic substances to come into contact with the body and be absorbed, acting in the body in a harmful way, fighting health.
Through speeches, the leaders usually tried to appeal to all audiences. Martin Luther King Jr’s speech “I have a Dream” was given to both dark-skinned and light-skinned people.
At first, he aims the speech at the light-skinned people, by referring to the dark-skinned person as someone separate.
The second part of the speech was more directed toward the dark-skinned people, so he used terms like “my people” and “we”
The third part of the speech was when he called for unity and referred to everyone as friends, and talks about his dream.
C because he has frustration the entire time
The ant being the smallest is an opinion