Match the following. systems
physical systems
processes initiated by people that shape earth's surface and
1. interact with plant and animal life to create, sustain, and
modify ecosystems
2. activities occurring in nature that shape the earth's surface
processes occurring in nature that shape the earth's surface
3. and interact with plant and animal life to create, sustain, and
modify ecosystems
physical and human processes that shape the earth's surface
4. and interact with plant and animal life to create, sustain, and
modify ecosystems
human systems
physical processes

an effect of the steamboat's popularity was that people began building canals in the united states and europe. this was done to find another way to transport goods across the country and in that time, transportation using the river was very slow and dangerous. it depended entirely on manpower and the current of the river. that all changed in the late 1700's when steamboats were introduced. they soon revolutionized travel and trade through the river and dominated the waterways. eventually, other means of transportation took over from the steamboats, but there was a time that they the united states to expand to the west.

answer: this is because archeologists keep finding artefacts and ancient ruins dated more than 10000 to 15000 years, date around scientists said humans discovered language; which is at least mysterious as scientists always have said that is necessary to have a language to have architecture and some basic maths.

explanation: brainlest

after the french-indian war.