Answer:
they graze through the water slowly with mouth opened
When skeletal remains of microscopic organisms make up more than 30% of the sediment, it is called "ooze." ... Calcareous ooze, the most abundant of all biogenous sediments, comes from organisms whose shells (also called tests) are calcium-based, such as those of foraminifera, a type of zooplankton
Answer:
its to protect them from bugs and other harmful and store water because they dont get much water
Explanation:
