Choose the word or phrase that best completes each sentence. Renewable energy provides power from resources such as
.

energy sources have a high negative impact on the environment.

One benefit of renewable energy is that its source is
.

Other renewable energy sources being developed are ocean and
energy.

1) Wind, sun or biomass. (Pick any of them)

2) Clean

Explanation:

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first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

they encountered severe weather for which they were poorly prepared.