The sailboat with the yellow stripes on its sails drifted across the lake.

Which of the following is the subject of the sentence?

• lake
sails
sailboat
• stripes

sailboat

The subject of the sentence is "sailboat."

To identify the subject of a sentence, you need to locate the noun or pronoun that is performing the action or being described. In this sentence, the sailboat with the yellow stripes on its sails drifted across the lake.

The subject of the sentence is "sailboat" since it is the noun that is performing the action of drifting across the lake. The other options, such as "lake," "sails," and "stripes," are not the subjects since they are not performing the action.