Respuesta :

"Tri" means three, "tetra" means four, "penta" means five, and "hepta" means seven, so heptameter is the best answer.  :)

(This also means that poems written with three feet per line would be trimeter, with five feet per line would be pentameter, etc.)
FireFlight
Tri means 3rd,
Tetra means 4th,
pent- means 5th,
hex- means 6th,
hept- means 7th,
octa- means 8th,
non- means 9th,
dec- means 10th.

It says The line is 7 feet, so it'll be heptameter.