Scientists have discovered a new plant that is exactly the same as Mars, ensest it has three times the man of Wars, How gravity on the surface of this planet compare to the gravity on Mars,

the part of the wave he is travelling on is the crest

the answer should be in the picture.

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.