Causes -

: A necessary cause must be present for an effect to occur (you need oxygen for fire), while a sufficient cause is enough on its own to produce the effect (a lightning strike is enough to start a forest fire).

: As a result , consequently , therefore , thus , so . Cause and Effect Using Informational Text causes

: In complex systems like weather or economics, a tiny initial cause (the metaphorical flap of a butterfly's wings) can lead to vastly different outcomes over time. Why We Seek "The Why" : A necessary cause must be present for

: A proximate cause is the immediate trigger—for example, a match lighting a fire. The ultimate cause is the deeper reason—why the oxygen, fuel, and heat were all in that place at that time. Why We Seek "The Why" : A proximate

: To understand a revolution or an economic shift, we must look at the underlying social and political causes.