Contact lenses improve lives. contact lenses are an example of a(n) (1 point)

The right answer is C.invention

Contact lenses are placed directly on the surface of the eye to correct your eyesight.

They can correct myopia and hyperopia. They can also correct age-related astigmatism and hyperopia (presbyopia).

Their principle is the same as for glasses: they bend the light and redirect it to your retina to improve your eyesight.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: