The answer is between A and C.
Answer: D. They must eat in order to gain nutrition
Explanation:
Answer;
-Pure chemical substance and element
Explanation;
-Pure substances are substances that are made of only one type of atom or molecule.A pure substance can be either an element or a compound, but the composition of a pure substance doesn’t vary.
-An element is a pure substance that cannot be broken down into different types of substances by chemical means. All elements are pure substances. An element is composed of a single kind of atom. An atom is the smallest particle of an element that still has all the properties of the element.
-Tungsten is an element and therefore a pure substance.
Answer: i would say D but i'm not entirely positive
Explanation:
this is showing how the energy is distributed between the types of organisms in an environment
