<prompt> Translate the following text to EnglishMteremko huo uliwalinda watu, lakini pia ulifanya usafiri wa aina yoyote uwe mgumu; njia nyingi za leo za kutembea hufuata njia za kale za farasi, ambazo kwa karne nyingi zilikuwa njia kuu ya usafiri.  <response>: The steep fells protected the population but also made transportation of any kind difficult; many of todays footpaths follow ancient pack-horse trails, which for centuries were the principal method of transport. 