by comparing the gravitational mass of galaxies to the luminous mass of galaxies
Focus means to concentrate without distraction.
Answer:
Selective attention is the process of focusing on a particular object in the environment for a certain period of time. Attention is a limited resource, so selective attention allows us to tune out unimportant details and focus on what matters.
The men's thick, wavy and unruly hair is hardest to comb out.
