Answer:
<h2>A. Keeping a body healthy from disease</h2>
Answer:
natural selection
Explanation:
According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
See creation.com for 101 evidences for a young universe. The age of the earth is not a question that can be asked in the present. This is due to the fact that dating methods rely on a number of assumptions.
Answer: biological food contamination
Explanation:
The possible number of main effect is THREE.
Main effects refers to the major conditions that are specify in the experiment; these are: room temperature, noise level and room colour. These three factors are manipulated in the designed experiment.
