Classification of trees in a forest is an example of a descriptive investigation
Explanation:
A descriptive investigation is aimed at describing/quantifying the characteristics of a given population or natural system. In descriptive research, the characteristics of the system are classified into descriptive categories. This type of investigation does not involve causal associations where a variable is tested to see if it will affect other variables. Examples of descriptive research include the classification of chemical elements in a periodic table, observing human social behavior under extreme conditions, etc.
"A gas is cooling to its boiling point and becomes a liquid" is the answer.
Condensation is the process where a gas becomes a liquid, like after a hot shower, there is fog on your mirror that slowly turns into water droplets after you've turned off the water.
Since the child 4 years old WIC milk is better, it is highly nutritious, though cow milk may not has side effect on the child because at that age cholesterol cannot affect the child but help in brain development