A proper noun is a name that identifies a specific person, place, or thing. Proper nouns are always capitalized, regardless of their position in a sentence. Examples of proper nouns include "John Smith," "New York City," and "the Mona Lisa."
The words "lotus" and "peacock" are not proper nouns because they do not identify a specific person, place, or thing. The word "lotus" is a general term that refers to a type of aquatic plant, while the word "peacock" is a general term that refers to a type of bird. These words are not capitalized unless they begin a sentence or appear in a title.
Here are some examples of how "lotus" and "peacock" are used in sentences:
* The lotus is a beautiful flower that grows in ponds.
* The peacock is a colorful bird that is native to India.
* The Lotus Festival is an annual celebration that takes place in China.
* The Peacock Throne is a famous throne that is located in Iran.
As you can see, the words "lotus" and "peacock" are not capitalized in these sentences because they are not being used as proper nouns.