briefly explain about irrigation, terrace farming, and new farming tools each changed how people got their food

Irragation and new farming methods allowed farmers to grow more crops which meant they were able to get way more money and more supplies for the people it caused alot of economic beneits and made it easier to get food quicker.

Explanation:

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )

i believe the answer is d.