Lightening can occur within a cloud and between clouds. this is called a. heat lightening b. fork lightening c. sheet lightening d. dry lightening ontario receives 50% of the precursors of acid rain from the industrial heartland of usa due to the transport of pollutants by the prevailing wind from a. west b. southeast c. southwest d. northeast

Sheet lightning.  D. South east.

Explanation:

Lightening that occurs between clouds and within clouds is called sheet lightning as this occurs due to disturbance in the balance between the storm clouds and ground in the form of bolts of lightning.

Ontario is a province bordering eastern central Canada,  gets its acid rain from the industrial heartland of the USA due to the transport of pollutants from the nearby river Michigan err and lakes. Where thriving industries of coal and steel plants are located.