They cling on to the ghost of Christmas Present because of how man "want" many things around this time of year and they'll do anything to get what is needed. Hence, there are some people who will do "ignorant" things to get what they want.
Spongin is a modified type<span> of collagen protein, </span>forms<span> the fibrous </span>skeleton<span> of most </span>organisms<span> among the phylum Porifera, the sponges. It is </span>secreted<span> by sponge cells known as spongocytes. Spongin gives a sponge its </span>flexibility<span>.</span>
the answer to your question is A .....
May i get brainlest PLS :)
