C. Atmosphere - which is the one sphere that means "air" or "gasses". The other ones mean, Biosphere = "living", Lithosphere = "land", and Hydrosphere = "water"
Answer:
Problems at port exists since ages. Finding solutions is important to have an effective environment in the port. Continuous Ship inspections with application of underwater drones. Installation of automated cranes . Using cosmic rays to scan for the contraband. Hydrogen powered tugs to reduce the toxic emissions . Having techniques for safer mooring.
