Final answer:
The semi-colon belongs between 'I like working outside' and 'I also enjoy reading,' making the correct placement option 2) Between 'I' and 'also'.
Step-by-step explanation:
The correct placement for a semi-colon in the sentence 'I like working outside I also enjoy reading.' is between two independent clauses. Semicolons are used to connect closely related independent clauses. In this case, we can see two independent sentences: 'I like working outside' and 'I also enjoy reading'.
Therefore, the semi-colon should go between the word 'outside' and the second 'I' from the sentence, which corresponds with option 2) Between 'I' and 'also'. The correct sentence should read: 'I like working outside; I also enjoy reading.'