It makes the data thet they collect more reliable so if they need the data again, they have already tested it a few times so therefor they know that it is right.
Three things that effect a life system would be
- sunlight
-water
-energy/food
Hope this helps
Military personnel also use periscopes in some gun turrets and in armoured vehicles. More complex periscopes using prisms or advanced fibre optics instead of mirrors and providing magnification operate on submarines and in various fields of science
The answer is slightly left and slightly right of the curved end of the horseshoe.
