Some sedimentary rocks are made from smaller rounded stones that have been cemented together called what? A: Intrusive rock
B: conglomerate rock
C: extrusive rock
D: marble

B.

Explanation:

Intrusive and extrusive rocks are igneous rocks and marble is metamorphic, by the process of elimination, B would be the correct answer.

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.