The weather was so plesant in the valley that the hikers decided to extend their stay and explore the surrounding trails for another day.
In the following sentence, four words have been highlighted which may be misspelt or inappropriate in their usage. Mark the erroneous word as the answer and if all the words are correct in their spellings and usage, choose ‘All are correct’ as the correct answer.

The correct answer is plesant.

Step-by-step Explanation:

1. Analyze each highlighted word in the sentence for spelling and contextual usage:

• weather: Spelled correctly and appropriately used to refer to atmospheric conditions (valley weather).

• plesant: Misspelled. The correct spelling is pleasant (meaning enjoyable or pleasing).

• extend: Spelled correctly and used correctly in the context of prolonging their stay.

• surrounding: Spelled correctly and used appropriately to describe the nearby trails.

2. Therefore, the erroneous word among the given options is plesant.