Answer:
Select
a and c
Hope it helps, please mark as brainliest.
It is because we are, this is the first time in human history, where we have technology and science is widely accepted, without being ridiculed by religious figures.
Answer;
Cell
Explanation;
-The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
-Cell is the basic unit and building block of life. It is bound by a cell membrane, and possesses a nucleus which acts as its brain. Arachnoidiscus ehrenbergi is an example of diatoms which are unicellular, therefore it is a cell.
If it is a healthy environment then the atmosphere will be happy meaning no dirty streets etc