Question

choose the word heaving silent letter fold. thumb. zoo. chair​

Answer 1

Explanation:

I think zoo

But follow me please

Answer 2

The word "Thumb" having silent letter 'b'

Explanation:

Thumb is pronounced as "Thuhm'

The word ' thumb ' has a silent letter, that is to say the letter, ' b. '

 In the case of other words, its pronunciation will be affected if any other letter is removed, making the word sound different.  

Silent letters are words that are not articulated, but contrast tremendously with the meaning and, in some cases, the articulation of the whole word.