Fill in the blank with correct option
In general Earth's magnetic ______ is getting weaker, leading scientists to say that it will eventually flip, like a bar ______ flipping over.

Options

A. i) area, tender
B. ii) field, magnet
C. iii) ground, chocolate
D. iv) power, gymnast

Explanation

field, magnet “Magnetic field” and “bar magnet” are terms used in Science.