Big changes in the prairie balance of nature can be caused by changes in the amount of Ofertilizers
rainfall
o
minerals
O carbon dioxide
Will give brainlist if I can

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.