Keystone

What is the primary meaning of the word 'keystone' in English?

• A type of stone used in construction

• The central principle or part of a policy, system, etc.

• A type of bird

• A musical note

In architecture, where is a keystone typically found?

• At the base of a column

• In the center of an arch

• On the roof of a building

• At the corner of a wall

Which of the following sentences uses the word 'keystone' correctly?

• The keystone of the bridge was painted red.

• She played a keystone on the piano.

• The keystone flew over the lake.

• He wore a keystone on his hat.

Identify the synonym of 'keystone' in the context of a system or policy.

• Foundation

• Decoration

• Obstacle

• Conclusion

Which part of speech is the word 'keystone' when used in the sentence: 'Trust is the keystone of our relationship'?

• Noun

• Verb

• Adjective

• Adverb

Choose the correct sentence that illustrates the metaphorical use of 'keystone'.

• The keystone was heavy and hard to lift.

• Education is the keystone of a successful society.

• The keystone was carved with intricate designs.

• He placed the keystone carefully in the arch.

What is the role of a keystone in an arch?

• To support the weight above the arch

• To decorate the arch

• To connect two walls

• To provide a base for the arch

Which of the following best describes a 'keystone species' in ecology?

• A species that is the largest in its habitat

• A species that has a disproportionately large effect on its environment

• A species that is the most colorful

• A species that is the fastest

In literature, what does the term 'keystone' often symbolize?

• Weakness

• Central importance

• Confusion

• Irrelevance

Fill in the blank: 'The new policy is considered the ______ of the company's strategy.'

• keystone

• corner

• edge

• roof