Decompression sickness manifests ITSELF with joint pain and it can be fatal.
'Itself is a word that is usually used as the object of a verb or preposition to refer to to an inanimate thing or an animal which has been mentioned previously as the subject of the sentence.
I guess it would either be mood or syntax
Answer:
it's a sunny Friday,on the day Muslims went to mosque to offer prayer in groups.
I went to the market this certain day which is on Friday,on this particular day my mum asked me to bought food stuff
To add specific factual details
