I am not completely sure, but I believe that the leader of the Jamestown colony described in this paragraph is John Rolfe.
data declaration means a variable which contain data value and it can be declared as integer, float, character, double, boolean (data types).
example:
int r;
char name;
float g;
double k= 23.34;
A system of interconnected computers that share a central storage system and various peripheral devices such as a printers, scanners, or routers. Each computer connected to the system can operate independently, but has the ability to communicate with other external devices and computers
<span>Read more: http://www.businessdictionary.com/definition/computer-system.html</span>