Questions

Mixing of blue and yellow colors make Green Color.

RYB (an abbreviation of red–yellow–blue) is a historical set of colors used in subtractive color mixing and is one commonly used set of primary colors. It is primarily used in art and design education, particularly painting.

RYB predates modern scientific color theory, which has determined that cyan, magenta, and yellow are the best set of three colorants to combine, for the widest range of high-chroma colors.

Stickle back

A ridge ine is a line formed along the highest points of a mountain ridge.

Irrigation canals are generally aligned along ridge lines.

Again, before you apply for a job to a call center you should be aware that most of the call centers cater to English speaking customers and this needs you to speak clear English without any grammatical mistakes. 

Fiber-optic physical or wired connection is the fastest communication connection.