14. Apart from heroes, the two factions also send weaker units at each other at regular time intervals. What are these units called?
From Quiz The "DotA" Quiz
Answer:
Creeps
Creeps are units that are sent along the lanes towards each other along the three lanes connecting the bases. For the Sentinel, the creeps are treant (melee), and the druid of the talon (ranged), while the Scourge have ghouls (melee), and necromancers (ranged). A new wave spawns every thirty seconds. At certain intervals, a siege creep will spawn with the wave, either a glaive thrower or a meat wagon, depending on the faction. Siege creeps are extremely effective at destroying buildings.
Creeps are generally the main source of gold and experience for heroes, especially in the early game when hero kills are not as common. It is possible to deny creeps, which involves killing creeps with low health to prevent enemies from receiving gold, and reducing the amount of experience gained by the kill. Towers can also be denied, but must be below 10% health. Towers provide a large sum of money when destroyed, and denying is always preferable.