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

Drag the tiles to the correct boxes to complete the pairs. match the stages to their features. low birth rates, death rates are constant high birth rate, and death rate high birth rate and low death rate pre-modern mature industrial industrialization

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

What are seismic dampers and why are they important?