Directions: A sentence/a part of the sentence is underlined. Alternatives to the underlined part, which may improve the sentence, are given. Choose the correct alternative. In case no improvement is…

The underlined part is the whole phrase 'lower the amount'. Replacing it with Lose, Cut or Reduce gives e.g. 'Try to reduce of fat in your diet', which is ungrammatical; the original 'Try to lower the amount of fat in your diet' is already correct, so 'No improvement'.