Typography geek question. What are the highlighted regions known as?

Cracked by: Sumanth Patlolla , s m muneer ali , Bipin Banavalikar , Supritha Maiya , Dibyo and Manish Achuth

Answer:
Ink Traps. An ink trap is a feature of certain typefaces, where the corners or details are removed from the letterforms. When the type is printed, ink naturally spreads into the removed area. Without ink traps, the excess ink would blob and ruin the crisp edge