Salinity variations in the open ocean normally range from 33 parts per thousand to

Salinity variations in the open ocean normally range from 33 parts per thousand (ppt) to 37 parts per thousand. Salinity could vary depending on location especially in oceans near a river or even surface water of oceans in the subtropics. However, in general, salinity should be 75% of the water in the ocean (approximately 34 - 35 ppt).

The reflection of the candle in the concave mirror formed an upside-down virtual image that is smaller than the candle.in other words. the answer is the third option, c