Answer:
The boundary between two air masses that have different temperatures or humidity. In the mid-latitude areas of the Earth, where warm tropical air meets cooler polar air, the systems of fronts define the weather and often cause precipitation to form.
Explanation:
Scientific definition for front
The answer would be C, double fertilization produces a triploid zygote and a tripped endosperm!
I believe the correct term to fill in the blank would be pain. <span>Phantom limb sensations and other experiences of amputees show that the brain can produce pain in the absence of normal sensory input. Hope this answers the question. Have a nice day.</span>