Canada's physical land scape

Canada has mountains, plains, lakes, valleys, and rivers. :)

cirrus clouds: lacy or wispy clouds that form at high altitudes it would generally happen before a change in the weather.

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.