During which process do frogs burrow in the summer to avoid extreme heat?
Frogs undergo aestivation, also known as summer sleep, to escape extreme heat. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Structural Organisation in Animals and Frog, Topic: Tissues, skeletal and organ systems.