The graph below shows extinction rates during different periods of Earth's history.How many mass extinction events do scientists commonly infer from these data? 
Definitions:
Virtual Booths
Online platforms that simulate physical exhibition spaces, allowing businesses to showcase products or services remotely.
Chronological Résumé
A résumé that lists what you did in a dated order, starting with the most recent events and going backward in reverse chronology.
Job Titles
Designations given to specific positions within an organization, defining the role, rank, or duties of the individual holding the position.
Networking
The act of connecting and building relationships with professionals or peers for career development or business opportunities.
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