Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

high temperatures, food additives and UV rays.

Explanation:

Factors that can increase mutation rates are high temperatures, food additives and UV rays.

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Factors that can increase mutation rates are UV rays.

Option D

Explanation:

The physical or chemical agent which damages the DNA and creates mutation are UV rays, gamma rays, and x rays. These rays damages the bonds between  the nucleotides specially between the thymine -thymine nucleotides resulting into thymine - thymine dimer. This mutations disrupts the processes like replication or transcription and can be corrected with the help of DNA repair mechanism of the cell.

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the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.