The fuel that comes from decayed organisms is petroleum
The correct answer is D; this is the statistical question as it is asking for data that can have a varying answer
A group of similar cells organized to perform a particular function is a "tissue."
Rust is brittle, oxidized iron (oxygen reacted with the iron in the metal to produce rust). Meanwhile, iron is a metal and oxygen is a gas under room temperature conditions.
People would keep doing the same investigation over and over again and no one would know who did what