Please help I’ll mark Brainiest also picture above

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

Solutions to environmental problems in europe must