Please help me, its urgent!!

Test:

Performing a Litmus Test

Result:

Litmus paper gives the user a general indication of acidity or alkalinity as it correlates to the shade of red or blue that the paper turns.

To test the pH of a substance, dip a strip of litmus paper into the solution or use a dropper or pipette to drip a small amount of solution onto the litmus paper.Blue litmus paper can indicate an acid with a pH between 4 and 5 or lower. Red litmus paper can show a base with a pH greater than 8. If a solution has a pH between 5 and 8, it will show little color change on the litmus paper.A base tested with blue litmus paper will not show any color change, nor will an acid tested with red litmus paper register a change in color.

The answer is a) taiga because taigas are cold