A. objects made of crystals minerals water and air
Process of elimination-
there isn’t organic matter in rocks so D is out
they are made of minerals so B is out
some types of rock (pumice) have air bubbles in them so A is more likely than C
Three reasons a species could become extinct include, deforestation, being overhunted, not enough food available.
There are around 640<span> to </span>850 muscles in human body and they can be categorized in three main groups: <span>skeletal, visceral, and cardiac. </span><span>
The muscles that extend the forearm are located </span>posteriorly. These are the muscles located on the back.
Either the Porifera (sponges) or the Ctenophores (comb jellies). The jury is still out on which group branched off the main animal line first.
