Answer:
Sam needs to go back to the supermarket because he forgot to buy eggs.
The correct answer is 4. because.
Sam realized that he forgot to buy eggs, so he needs to go back to the supermarket in order to purchase them. The word "because" indicates a cause-and-effect relationship between Sam forgetting to buy eggs and his need to return to the supermarket.
By going back to the supermarket, Sam will be able to complete his shopping list and ensure that he has all the necessary items, including eggs. This will prevent him from having to make an additional trip to the store later on.
In summary, the word "because" accurately conveys the reason why Sam needs to go back to the supermarket: he forgot to buy eggs
Step-by-step explanation:
<3