Answer: true
The cause of a disease is also called etiology. The cause must happen before the disease develop. Without the cause, the disease shouldn't appear too.
This makes the research to determine a cause of disease have to take the examination in multiple times. A research that takes one time data like cross-sectional won't show causation.
In an endothermic reaction, energy is absorbed which causes the object to heat up.
Answer:
These include the carbon oxides, hydrocarbons, and halocarbons (molecules with carbon bonded to F, Cl, Br, or I).
Explanation:
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