Which energy source would provide the cheapest electricity for a factory?
solar panels
wind turbines
gas generators
a hydroelectric plant

Ineed someone to describe what they mean in the instructions !

Afilm, like any other artwork, can never be totally understood and appreciated through critical analysis, no matter how complete or astute, although such analysis can open up new levels of meaning and appreciation for the sensitive viewer.

What computer software program was used to create the design for the structure above? what is the main advantage to this program?