Our water resource face a host of serious threats , all of which are caused primarily by human , that included sedimentation , pollution and much more
Answer:
Sample
Explanation:
Samples are used in statistical testing when population sizes are too large for the test to include all possible members or observations. A sample should represent the population as a whole and not reflect any bias toward a specific attribute.
D. When a natural disaster strikes, FEMA is there to assist the public. An answer that is not there, but one that helps is the red cross, although they are not federal.
