Multiple choice

Directions: Fill in the blank with the correct option.

An arthropod is an invertebrate with a segmented body and ____.

  1. hard outer shells

  2. the hard outer shell

  3. a hard outer shell

  4. the hard outer shells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sentence requires an indefinite article 'a' before 'hard outer shell' because it is a singular countable noun being introduced for the first time in the list of characteristics.

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