30% stock solution of potassium permanganate (KMnO4) was diluted four times as follows: 0.1 ml of
stock was added to 0.4 mL of distilled water; 4.5 mL of distilled water was added; the resulting solution was
diluted 1:3; the resulting solution was again diluted to 0.06 L The final concentration of the solution was:
1.36%
50 mg/ml
5 mg/ml
0.05%

D. is the answer hope that you

Ametal with a large number of free flowing electrons most likely has good conductivity

Large asteroid and comet impacts. because they can have a huge impact on the environment, such as a loss of land, and crust on the earth with the big holes they produce. on the other hand, volcanic eruptions can also cause change within the environment by producing land, but im actually not quite sure which one would be a better answer, hopefully you read this and didnt just flat out choose the first sentence i have spoken! your welcome~