Identify the rhetorical device found in this line And let every other power know that hemisphere intends to remain master of its own house?

The rhetorical device used in the line "And let every other power know that hemisphere intends to remain master of its own house" is metaphor.

Here's why:

* "Master of its own house" is a metaphorical expression. It doesn't literally mean that a hemisphere has a house or is in charge of a physical dwelling.

* The metaphor is used to convey the idea that the hemisphere is in control of its own affairs, independent and self-governing. It implies a strong sense of autonomy and power.

The line uses a common metaphorical association of "house" with a nation or region, to create a vivid and impactful image of the hemisphere's determination.