Answer: Water is drawn in through small openings on a sponge's body called OSTIA.
 The supportive skeleton of a sponge contains SPICULES which provide protection from predators.
Explanation:
Sponges refer to any of the aquatic animals of the phyllum porifera which is normally characterized with porous structures and has horn-like calcareous internal framework.
 Sponges usually have multiple pores called "OSTIA" on their bodies that allow water to enter them.
 Most sponges are sessile and because of this, they can't run away from predators. They usually have sharp "SPICULES" which are part of their skeleton that provide them some certain degree of defense. Apart from this, they also produce toxins which poisons predators that attempt to consume them
 
        
                    
             
        
        
        
A. 
<span>f(-2) = 2^(-2 - 2) </span>
<span>f(-2) = 2^(-4) </span>
<span>f(-2) = 1/2^4 </span>
<span>f(-2) = 1/16</span>
        
             
        
        
        
The plant cell is able to withstand the expansion of the central vacuole as the result of the rigid cell wall which it possess. The plant cell wall provide a rigid structure which support the activities of the cell.
        
             
        
        
        
A search method employed by two or more people overlapping separate line searches forming a grid. 
Not to sure tho hope this helps
        
             
        
        
        
The answer would be “D,” as gravity is the force that keep all objects on Earth’s surface.