<span>The two ways to show precipitation on a weather map is first through reading the air. The second way in order to present precipitation on a weather map is through the isobars. Isobars or also called nuclides are lines that have a connection to the atmospheric pressure.</span>
Answer:
Alfred nobel also created dynamite
In the study of history the available documents for studying a certain period is unchanging over time.
Option: B
Explanation:
History is the study of events and phenomena over space and time. Space means where the particular incident is taking place. Time means the period of occurrence of particular event. A certain period suppose the period of sultanate or mughal empire requires some documents, records to be studied in detail.
And these available documents, records can never be changed over time. History is study of things over changing space and time. Archaeological evidences also keep some valid documents for studying historical events.
<span>Primary sources are first-hand accounts of a topic while secondary sources are any account of something that is not a primary source. Published research, newspaper articles, and other media are typical secondary sources. Secondary sources can, however, cite both primary sources and secondary sources.
</span><span> Hope this helps :) :)</span>