What reason did cornwallis give for staying at yorktown and trying to defend his position there

The correct answer to this open question is the following.

The reason that Cornwallis gave for staying at Yorktown and trying to defend his position there was that he had received orders from General Clinton -the commander of the British troops in the Revolutionary War-  to protect the harbor in the Chesapeake Bay, to guard the British fleet. Lord Cornwallis chose Yorktown because it had deep waters in the York River. But by that time, the Continental Army led by General George Washington had already received the support of 5000 French soldiers that helped the Americans to defeat the British.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.