Answer:
The question is not complete since it does not offer the options of diagrams for the sentence, here are the options of diagrams and the first picture is the correct one
Step-by-step explanation:
To diagram a sentence you have to start by defining your subject and predicate, here the subject is "The boy" and the predicate is "ate the fresh broccoli", then you need to identify the noun and the verb which are "boy" and "ate" then you have to connect the words that modify them with a diagonal line, this words are "the" (modifies boy), "The" and "fresh" (modify broccoli)