Q: Answer this question:

what is the main source of heat and light energy??

A: Incandescence


Q: Answer this question:

dog who waited for master at train station??

A: Hachikō


Q: Answer this question:

what windows term describes moving from one location to another??

A: drag-and-drop


Q: Answer this question:

who invented the caravel or the first ship to be able to sail against the wind??

A:
the Portuguese