Select the most appropriate option of substitute the underlined segment in the given sentence. If no substitution in required, select No improvement. The female ostrich guards the nest at night and the male guard it in the day.

  • 1

    guard it during the day

  • 2

    No improvement

  • 3

    guarding it during day

  • 4

    guards it during the day.

Answer:- 4

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