Which word is a synonym for shift in this sentence: This book will provide a detailed examination of the Little Ice Age and other climatic shifts, but, before I embark on that, let me provide a historical context.

• change

• flaw

• conceal

• unravel

Which word is a synonym for embark on in this sentence: This book will provide a detailed examination of the Little Ice Age and other climatic shifts, but, before I embark on that, let me provide a historical context.

• neat

• triumph

• begin

• end

Which word is a synonym for oppose in this sentence: We tend to think of climate - as opposed to weather - as something unchanging, yet humanity has been at the mercy of climate change for its entire existence, with at least eight glacial episodes in the past 730,000 years.

• mimic

• against

• again

• agree

Which word is a synonym for existence in this sentence: We tend to think of climate - as opposed to weather - as something unchanging, yet humanity has been at the mercy of climate change for its entire existence, with at least eight glacial episodes in the past 730,000 years.

• survival

• strength

• movement

• principle

Which word is a synonym for glacial in this sentence: We tend to think of climate - as opposed to weather - as something unchanging, yet humanity has been at the mercy of climate change for its entire existence, with at least eight glacial episodes in the past 730,000 years.

• icream

• icy

• enormous

• huge

Which word is a synonym for irregular in this sentence: Our ancestors adapted to the universal but irregular global warming since the end of the last great Ice Age, around 10,000 years ago, with dazzling opportunism.

• unusual

• complex

• elaborate

• exclusive

Which word is a synonym for dazzling in this sentence: Our ancestors adapted to the universal but irregular global warming since the end of the last great Ice Age, around 10,000 years ago, with dazzling opportunism.

• suspended

• brilliant

• available

• descriptive

Which word is a synonym for unaccustomed in this sentence: They developed strategies for surviving harsh drought cycles, decades of heavy rainfall or unaccustomed cold; adopted agriculture and stock-raising, which revolutionised human life; and founded the world's first pre-industrial civilisations in Egypt, Mesopotamia and the Americas.

• dependable

• unusual

• underlying

• unreliable

Which word is a synonym for famine in this sentence: But the price of sudden climate change, in famine, disease and suffering, was often high.

• scarcity

• standard

• principle

• convention

Which word is a synonym for unprecedented in this sentence: They are the deeply important context for the current unprecedented global warming.

• conceived

• extraordinary

• associated

• repeated