do the classification keys you have just worked with have any limitations in distinguishing between species? please answer in dying here guys

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Analyze how the water cycle affects a food web. now list 3 examples for each below using complete sentences, on how too much water would affect the same web? how about to little water?

Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down