Answer:
Friends.
Step-by-step explanation:
The direct object is the object in a sentence that receives the action performed by the subject. It is a noun phrase that answers the questions 'whom?' or 'what?' On 'whom' the action was performed or 'What' received the action of a sentence.
For example, The car hit me. The subject in the sentence is 'car' and verb is 'hit' the action was perfomed on 'me' which becomes the direct object of the sentence.
In the given sentence, the subject is 'Alicia' and verb is 'fight' the action was received or perfomed on Alicia's 'friends' which becomes the direct object.
So, the direct object in the given sentence is 'Friends.'