Step 1: Identifying the error in the sentence.
The word 'cattles' is incorrect because the plural form of 'cattle' is the same as its singular form. We don't use 'cattles' as a plural form.
Step 2: Analysis of options.
- cattles: Incorrect, as 'cattle' is already plural and does not need the 's'.
- are: Correct in this context as it agrees with the plural subject 'cattle'.
- in: Correct, no error with this word.
- the: Correct, no error with this word.
Step 3: Conclusion.
The error is in option 'cattles', as 'cattle' is already a plural noun.