Why is "your line" used instead of "the line"? Is it because the speaker said "your coconut" before? Is it a common use of the possessive form?
Answer from a Native speaker
This is a good question! Most people might simply use the article "the" to refer to "coconut" and "line." However, many Americans have the habit of using "your" (or even "our" and "my") instead to make it sound a little more casual, friendly, or inclusive. This is especially the case when giving instructions on how to do something, as the speaker is showing you how to do things using your own tools/items. Of course, this pattern is generally only used when speaking and is not appropriate for formal writing. Ex: In order to make orange juice, you want to take your orange and cut it in half before squeezing it. Ex: Step on your pedal to move the bike forward.