if you could add any building item options to your virtual train to improve its design, what
would those items be, and why would you need to add them?

i just need the last question to my lab report so just name a random thing you’d add to a train

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures