Which is a property of laser light that makes it useful for cutting metals?
a. its focused energy
b. its single color
c. its scattered energy
d. its multiple colors

Option A,  its focused energy

Explanation:

Laser light is unidirectional and thus its energy is focused in one direction only.  The laser beam propagates in a starlight line almost like parallel rays  with least /no divergence. This allows the energy of the photons with in the laser beam to collect and focus in one direction/or at one specific point only. Along with being directional, these laser beams are coherent and monochromatic.

Hence, considering the basic characteristics of laser beam, option A is the correct answer.

that is wrong, its not thymus.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%