You’re researching the secret plot behind the john f kennedy assassination. you find a biography about the life of lee harvey oswald. the source is: a primary source or a secondary source

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As this is a biography I believe  it is a secondary source

Explanation:

Primary sources provide a first-hand account of an event and is authoritative. They represent original thinking or events they can share new information. Secondary sources involve analysis or evaluation of primary sources. For example, an autobiography is a primary source while a biography is a secondary source.

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explanation:

shower, toothbrush, toasters, refrigerators,   and the lights

you use the lights to see and brighten a room. and with out them you cant see. you need a toothbrush to clean your teeth with out it stinky breath. shower to wash ya self and without it you stink. toaster to toast stuff without it nothing is toasted. and the refrigerator to keep stuff cold without it everything goes bad