What does the underlined word mean in the following sentence?

La autopista tiene mucho tráfico.

the boat
the freeway
the bus stop
the subway

What is a verb infinitive and what does is mean to conjugate a verb?

What is the longest word in the world? this is grammar.

Choose the correct geographic feature to complete each of these sentences. 1.is located at letter a. 2.the euphrates river is located at 3.the zagros mountains are located at 4.the taurus mountains are located at