Which factor is responsible for the red color of mars?
sulphur dioxide
methane
iron oxide
nitrogen

The best answer is iron oxide.

Also known as the red planet, the red color of Mars is die to that its regolith (surface material) contains high amount of iron oxide, which is the same compound that renders blood and rust red.

The iron oxide in Mars is thought to have formed long ago. The rusty material was spread around the planet in the huge dust storms that are so characteristic of the this planet.

The red color caused the Greeks of ancient times to give it the name of their god of war.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.