What is the role of a pioneer species in primary succession? O to destroy parasites
O to provide shade
O to provide fruit
O to produce the soil

d. to produce the soil

Explanation:

pioneer species produce soil so other species less hardy can grow

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.