Correct Answer: senile

Solution : Given:
hello, lower, error, organ, analyse, ?

The pattern usd here is that the next word is formed from the last two letters of the previous word.
hel lo → lo w er → er r or → or g an → an aly se
So, the next word will contain 'se' as the first two letters.
Let's check the options –
First option: night→ The first two letters are not "s" and "e".
Second option: rapture→ The first two letters are not "s" and "e".
Third option: senile→ The first two letters are "s" and "e".
Fourth option: watch→ The first two letters are not "s" and "e".

"Senile" is the word that follows the pattern. Hence, the third option is correct.