What conditions led to starvation and what characteristics of the colonists contributed to this problem?

Picking a poor settlement for hunting and fresh water, not familiar with farming, unable to make alliance with Native Americans, lack of supply ships from England

Explanation:

The English settlement at Jamestown had been established on May 24, 1607, with the arrival of three ships commanded by Captain Christopher Newport. The initial small group of 104 men and boys chose the location because it was favorable for defensive purposes, but it offered poor hunting prospects and a shortage of drinking water. Although they did some farming, few of the original settlers were accustomed to manual labor or familiar with farming. Hunting on the island was poor, and they quickly exhausted the supply of small game. The colonists were largely dependent upon trade with the Native Americans and periodic supply ships from England for their food.  A series of incidents with the Native Americans soon developed into serious conflicts, ending any hope of a commercial alliance with them. This forced the settlers into close quarters, behind fortified walls, severely limiting their ability to farm the area and trade with other Indian tribes. Various attempts at farming led to kidnappings and killings by the Powhatans, while expeditions to establish relations with other Native Americans resulted either in the emissaries being ambushed and killed by the Powhatans, or proved fruitless in gaining sufficient supplies.[citation needed] The combination of disease, killings, and kidnapping almost obliterated the initial English population.