Answer:
B. They use energy from the sun to make their own food
When echinoderms move in a manner such as walking or crawling, they pump sea water through a series of internal body canals. The water is used to inflate some of the tube feet, causing them to expand. In many species, the tube feet are equipped with suc(k)ers that grip onto the sea floor.
1 mile.
Since he walks at a speed of 2 miles per hour, he will have only walked 1 mile after walking for half of an hour.
It was named reaction. Distilled waters for family aquariums in light of the fact that it does not have the chemicals reaction in tap water. It is essential to supplement refined water when utilizing it for fish keeping; it is excessively unadulterated, making it impossible to maintain the compound responses expected to help an aquarium biological system.
