How an ultrasound is able to produce images of body structures by <span>the sound waves which reflect off of the soft tissue, and a computer converts them into sonograms or visual images. Hope this is the answer that you are looking for. Have a great day!</span>
Africa is known for their precious diamond mining so diamond is one. Oil is also another big thing
This condition is called presbyopia.
Presbyopia refers to the condition where individuals aged 40 and above have a deterioration in their ability to see nearby objects. They experience difficulty in tasks like reading and typing. P<span>resbyopia occurs due to reduced elasticity in the lens of the eye as a result of aging. This is why individuals with previously normal vision often require "reading glasses" after their 40s .</span>
I believe the answer is: b. allow efficient gathering of unobservant phenomena
Survey is conducted by letting the subject to fill up a set of questionaires by their own without the supervision of the researchers. Because of this, gathering needed information became extremely efficient since it can be conducted with very little labor resource and could take up large number of population.
