Which of the following part of the brain sends signals "alert" to the higher centres in response to incoming messages

Which of the following part of the brain sends signals "alert" to the higher centres in response to incoming messages

دماغ کا مندرجہ ذیل میں سے کون سا حصہ آنے والے پیغامات کے جواب میں اعلی مراکز کو سگنلز \"الرٹ\" بھیجتا ہے
Explanation

Reticular formation part of the brain sends signals "alert" to the higher centres in response to incoming messages