The answer is number a is true
Pasteurization is a process where certain packaged or non-packaged food such as milk or fruit are treated with mild heat. The goal of this process is to eliminate pathogens ( infectious agent or germ) and to extend the product's shelf life.
The inventor of pasteurization was the French scientist<em> Luis Pasteur</em>. In his research he demonstrated that thermal treatment would inactivate unwanted microorganisms in wine.
Vaccination is the application of antigenic material (vaccine) to stimulate the body's immune system and to develop an immunity to a pathogen (germ).
Smallpox was the first ever disease for which a vaccine was developed. It was invented in 1976 by the English physician<em> Edward Jenner.</em> Jenner was the first person to publish evidence that the vaccine was effective. The name vaccination derives from Latin<em> vacca </em>(cow), because it was derived from a virus affecting cows.
Answer:
It was created after the event took place
Explanation:
There are two types of sources in history, primary and secondary.
Mount Vesuvius erupted in AD 79 while the painter painted it on the oil canvas in 1812. The painter was not present during the event, the painting is an imaginary depiction of the eruption, so it is a secondary source.
If the same painting was created by someone who was present when the volcano erupted, then it would have been considered as primary source.
Answer:
The right answer is "Marked the end of the use of wooden warships powered by sails and wind."
Explanation:
One of the major developments of the Civil War (1861-1865) was the construction, use and proliferation of ironclad ships. There was also an increasing use of steam power, shell guns, rifled ordnance and screw propellers and other new technological acquisitions. All of this was a reflection of the rising role of technology in armaments.
