La Niña, this is because it blows warm air into places like Australia and Indonesia causing wetter conditions than normal, while making places like the southwestern US much drier.
Ice ages and interglacial periods don’t happen frequently and there are rainy seasons in Australia every year.
And El Niño affects South America as it moves warm air East towards the Americas, not affecting the areas specified in the question.
I hope this helps!
Yes the goal of the historian is to create accounts of events and also to interpret them.
Answer:

Step-by-step explanation:
In the given triangle we have to find the ratios of
,
and 
Given:

Ratio of 

Ratio of 

Ratio of 

Answer:
The description corresponds to an observational study.
Explanation:
In Observational studies, researchers observe the effect of a risk factor without changing what is exposed to it or its conditions. On the other hand, in an experimental study, researchers can introduce a change and study the effects of it.