What is the purpose of the spicula (spikes) in a sponge? O reproduction
O respiration
O obtain energy
O defense adaptation​

Why might have people followed the rivers to find their way into asia

The causes of the failure of the league of nations

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)