What book is this? We can’t answer the question without knowing what the book/passage is
I do not believe a comma is necessary in this sentence at all. In fact, if you were to insert a comma after the word grazed (as you maybe tempted to do) it could change the meaning of the sentence. If you meant the lions were oblivious of the presence of the gazelles, you would insert a comma after grazed. But if you meant the gazelles were oblivious of the presence of the lions, you would leave the comma out.
Answer:
<u>through</u> and <u>over</u>
Explanation:
To answer this question, you must first understand what a <em>preposition</em> is. You can think of a preposition like a connector of words. Typically followed by a noun, prepositions give you additional information about said object. For example, the words <u>through</u> and <u>over</u>, in this case, tells you where "he" went, which is in the garden and the hill.
Hope this helps! :)