In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Python snake, also known as Ajgar, is one of the most (1)______ built snakes of the Indian sub-continent. It belongs to the Boidae family and is (2)______ on water to quite an extent. One of the (3)______ features of the Rock pythons of India is that they can raise their body temperature above the ambient level (4)______ muscular contractions. Rock python is a (5)______ creature, moving only while hunting or when threatened.