Help me fill in the blanks with the correct word in parentheses using el imperfecto tense

What is the main idea of this audio passage? transportation in latin america . where is this conversation most likely taking place? en la casa what advice is given to joel? don't fall in love with margarita. what is this person doing? giving directions to the university. what is david's problem? he wants to exercise more but he doesn't have time. these are all the right answers on edge spanish2 someone answer to keep the question

Unas son redondas (round), otras ovaladas (oval), unas piensan mucho, otras casi nada. ¿qué es? uno larguito, dos más bajitos, otro chico (small) y flaco (skinny), y otro gordazo (fat). ¿qué son? como la piedra (rock) son duros (hard), para el perro un buen manjar (delicacy) y sin ellos no podrías (you couldn't) ni saltar (to jump) ni caminar. ¿qué parte del cuerpo describe? juntos vienen, juntos van, uno va delante, otro va atrás (behind). ¿qué son?

In english, cuidadoso means: nosy understanding careful