Question

marco is always looking for the shortest route home.
past progressive present progressive future progressive

Explanation:

The sentence "Marco is always looking for the shortest route home" has the structure of present progressive tense (subject + is/am/are + present participle). The verb phrase "is looking" follows the present progressive form, indicating an action that is ongoing or habitual in the present. Past progressive would use "was/were + present participle" (referring to past ongoing actions), and future progressive would use "will be + present participle" (referring to future ongoing actions), which don't match here.

Answer:

present progressive