Fill in the Blanks

The Great Barrier Reef is a unique geographical feature that requires the definite article "The" before it. "A," "An," or no article would be incorrect because they are used for general or non-specific references.

The sentence has "an arthropod" (singular), so the description must be singular: "a hard outer shell." Options with "shell(s)" are wrong because they don't maintain subject-verb consistency and "the" would incorrectly specify a particular shell.

This is the correct option.

This is the correct option.

This is the correct option. ‘Shall’ is used for expressing the future tense.

Someone or something famous or notorious is called legendary. This option is correct.

The power of attraction of something is called its appeal. This option is correct.

A prolonged and persistent effort to surround and blockade a place with the intention of protest is called a siege. This is the correct answer in this context.

Continuous observation to oversee something is called surveillance. This option is correct.

To prove something as false is to refute it. This option is incorrect.

Something happening currently is called prevailing. This option is correct.

This is the correct option.

Confound means confuse. This option is correct.

This is the correct option. ‘Across’ is used to refer someone moving from one side to the other side.

This is the correct option. ‘Between’ implies the region separating the two countries.