Relative pronouns

What do you call a set of large, destructive flames ...... spread quickly over woodland and bush?

What do you call an extended period of unusually dry weather .... there is not enough rain?

What do you call the situation in .... you cannot get something that you need?

What do you call the event that wants to help after a disaster? For example celebrities .... want to help organize concerts, volunteer on the spot or donate money.

What do you call do person .... first reached the South Pole?

What is the name of the country .... highest mountain is Kilimanjaro?

What is the name of the software company .... headquarters are in Redmond, Washington?

What is the word for the person ... is friendly and energetic and finds it easy and enjoyable to be with others?

What do you call the organization that was established in 1945 and ..... aim is to solve world problems peacefully?

What is the general term for people one of .... is Marconi?