Answer:
The speaker of Okita's poem attempts to characterize herself in ways that have little to do with her heritage.
Step-by-step explanation:
Depending on what the purpose of the text we're writing is, we will use different types of language/vocabulary.
Academic vocabulary is used in academic texts and dialogue. At school, you might encounter it in classroom lessons, books, assignments, and tests. Words that make it up are usually not used in informal conversation. For example, while talking with your friends, you would use the verb watch. Instead of it, when writing an assignment, you would use the verb observe.
The option that contains academic vocabulary is the fourth one: The speaker of Okita's poem attempts to characterize herself in ways that show little to do with her heritage.
The first two sentences contain very informal language (e.g. phrases to have a go, to have a crack). The language used in the third sentence is not as informal but is still relatively conversational.
The fourth sentence contains words such as to attempt, to characterize, and heritage, which can be considered to be parts of the academic vocabulary.
This is why the fourth sentence is the correct one.