Identify the true statement. choose one: a. the earth's magnetic field is generated in the liquid outer core. b. the inner core is getting smaller. c. the outer core conducts because of thermal convection. d. the base of the outer core is always denser than the upper part of that layer.

A. The Earth's magnetic field is generated in the liquid outer core

Explanation:

Due to the presence of molten liquid the earth outer core on earth producer current that makes in motion the current that creates the heats and this form of heat then tens to escape and reaches out into the layers of the earth as the process of a dynamo. The spinning of the earth and the Coriolis force thus caused the liquid iron to generate the electric currents that in general creates the magnetic waves and the magnetic fields are created.

D.haka is the first answer and a.canberra is the second answer

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].