Answer:
There is two main kind of historical sources such as:
Primary sources, it may be oral or hand-written, it is generally which is originated in the past, it can be eye witness or chronicle or observer living during a particular historical era.
Secondary sources, on the other hand is the information gathered by someone who did not actively take part in or witness a historical event, secondary sources include such as articles, magazines, popular history textbooks, etc.
Explanation:
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Answer: C) They can contain contaminants that can enter the air during storms or high winds.
Explanation: A is wrong because I got it wrong (Sorry, can't give much explanation there).
B is wrong because water contamination does not directly relate to respiratory health.
D is wrong because fertilizers can impact respiratory health (Explanation seems lack-luster, but I feel like this is common sense).
Hope this helps :)
Answer: An endangered species is where a species of animals has a low population therefore making it endangered
One reason of decline in honeybees is destruction of habitat with pesticide and global warming this decline in plants has had a direct impact to the decline of honeybees.