A.<span> Air pollution............................</span>
Well let's take Sedimentary rock for example, The Law of Superposition which measures the average age of Sedimentary rocks using rocks around it. So you would use that rocks below it are older and that Extrusions and Intrusions are younger than the rocks which are stable.
Answer:
a,the ability to go from a single cell to multicellular organism
The leading cause is garbage and waste from people.
The best answer would probably be observation because a hypothesis and theory is not always reliable. an observation describes what IS happening during the experiment.