The answer is b it occurs in plant animals and bacteria
Answer; Molluscs
Is that what your asking?
<span>Features matched with its description
A: stalactites 3: tubes with hollow centers
B: stalagmites 2: tubes without hollow centers</span>
<span>C: speleology 1: cave science</span>
D: speleothems 4: cave features
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</span>Speleology is shortly defined as the<span> scientific study of caves.</span> Speleothems are structures<span> formed in a cave by the deposits of minerals from water dripping from the fractures of the ceiling of the cave. Most common types are the stalactites and stalagmites. </span>
<span>Stalactites began as a ring of crystals which later becomes small tubes with a hollow center.</span><span> Stalagmites, on the other hand, are tubes formed without hollow centers. </span>
B- Metamorphic rocks. metamorphic rocks are formed through the change of igneous and sedimentary rocks. which sandstone and basalt are. metamorphic rocks are also formed through heat and pressure
Yes. Half life or better known as Radioactive decay is measured in TIME. Such as seconds, minutes, hours, days, years ect...
:) hope that helps you some, best of luck!
