Why was Jamestown built on a peninsula?

When Jamestown was founded in 1607, the settlers built their fort on a peninsula. This peninsula did not have good land for farming and didn't even have access to fresh water, and many colonists died in the first few years.

The peninsula did not have good land for farming and didn't even have access to fresh water. Many colonists died within the first few years

моля да ми помогне с английски език аз не разбирам

molya da mi pomogne s angliĭski ezik az ne razbiram