If you were designing a cord for television using two materials with different levels of electrical conductivity, for safety you would place the substance with conductivity the cord.

lower ; outside.

Explanation:

Conductivity of a given material is the measure of electrical current that can pass through the material.

A good conductor has high conductivity while a bad conductor has lower conductivity.

Insulators have zero conductivity.

While preparing the cord the material with lower conductivity should be used to construct outer layer of the chord so that accidental electrical shock and short circuit could be avoided .

it would be c. xylem.

they deliver oxygen to the blood