Question

Fill in the blank with the most appropriate word:
They all praised her________ being brave.
A. On
B. Upon
C. With
D. for

Answer 1

Hint:Prepositions and postpositions are a class of terms used to convey spatial or temporal relationships or to mark different semantic functions, called ad positions. A preposition is a word (usually a short word) that sits before a noun to illustrate the connexion between the noun and a neighbouring word.
The commonly used prepositions are- A preposition is a word (usually a short word) that sits before a noun to illustrate the connexion between the noun and a neighbouring word

Complete answer:
A preposition is a word that comes before a noun or a pronoun and creates a link between a clause or word elements.
Option D) is the correct answer, as it suggests a reason (to be brave).
It is not possible to use 'on' on 'and' with 'here because they signify a position, wishing someone something, and inclusion of something respectively.
They all praised her for being brave.

Additional information:
Prepositions show how two words are linked. Lots of prepositions (e.g., "on," "in," "near," "behind," "under," "inside") tell us where things are relative to each other. For example: The cat sat on the mat.
Object of a Preposition- The word (or phrase) that follows a preposition is called the object of a preposition. If there is a preposition, there will always be an object of the preposition. A preposition cannot exist by itself.
 Prepositional phrases- A prepositional phrase is made up (including any modifiers) of a preposition and the object of the preposition. There are very prominent prepositional sentences. They act either as adjectives or adverbs.

Hence the correct answer is option ‘D’

Note:Preposition is used to link the words of a sentence. The use of prepositions is considered very important in English grammar. For the correct use of prepositions, you have to strengthen your vocabulary and also study the rules related to prepositions.