QUESTION : When does erosion take place? a. after water, ice, and wind make rock from soil and sediment

b. as tectonic plate collide and one plate sinks below the other

c. when heat and pressure inside Earth changes a rock's structure

d. as water, ice, wind, and or gravity move soil and sediment from one place to another

please help i will mark brainliest

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)