Answer:
Astronauts have safety tethers which are the same thing as cords/ropes which prevents them from floating away from the moon.
Answer:
The diffrence between these very similar gases is that ozone contains three oxegyn atoms well the oxegyn we breate contains two atoms. Its like this because solar rays convert O2 to O3
As humans migrated throughout the world, populations encountered distinct pathogens, and natural selection increased the prevalence of alleles that are advantageous in the new ecosystems in both host and pathogens. This ancient history now influences human infectious disease susceptibility and microbiome homeostasis, and contributes to common diseases that show geographical disparities, such as autoimmune and metabolic disorders.
It looks like it would be the 1st answer choice...
Hope this helps!! (:
