A succession of three warlords. Thank you, hope this helped
The answer is decrease, increase
Ellos tuvieron que adaptarse al cambio climático y tuvieron que desarrollar nuevas formas de crecer y cosechar los alimentos.<span>
</span>
A historian would first look at the reliability of a source - when it was published and what was happening at the time (context), who wrote it and their qualifications, any bias the author may hold, whether author sources corroborate the source, whether the author has used references, whether the source provides evidence, who the source is representative of and whether the source provides a balanced perspective
