Answer:
d. Main idea
Explanation:
The main idea of a paragraph refers to the point or idea that the author intends to convey. Thus, it communicates the aim, purpose and topic of the text. Therefore, the rest of the sentences in the paragraph act as the supporting details, since they develop, explain and exemplify the main idea, which is usually stated in the topic sentence.
Answer:
"geo-" is the root word; "-logy" means 'the study of.'
