Tonya mailed her brother a postcard from Australia.

Which word is the direct object of the sentence?

postcard

The direct object of the sentence is "postcard."

To identify the direct object in a sentence, we need to first understand what a direct object is. A direct object is a noun or pronoun that receives the action of the verb in a sentence. In this case, we need to find the word that is being mailed.

To determine the direct object in the sentence, we can ask the question: "Tonya mailed what?" The answer to this question will give us the direct object. Let's apply this question to the sentence: "Tonya mailed what?". The answer is "postcard".

Therefore, the word "postcard" is the direct object in the given sentence.