Answer:
Re-writing the paragraph so that it is free from fragment and run-on sentences:
(1) Farmers have been trying to keep hungry birds out of their crops for centuries. The first scarecrow was invented for this reason.
(2) Small birds destroy thousands of dollars' worth of
crops each year, and farmers are forced to fight back to protect their crops.
(3) Chemicals effectively ward off birds, but they are capable of harming the crops.
(4) Some farmers have even tried to scare the pesky birds with noise from cannon fire!
(5) Recently, however, a group of farmers tried something new. They brought in even bigger birds, falcons, to frighten the smaller
birds away.
(6) Falcons are cheaper than chemicals, and less frightening than cannon fire.
(7) Falcons are birds of prey. When a smaller bird sees one, (8)it flies away.
(9) Falcons are not only helpful in the fields, they are used in airports and landfills too.
(10) At landfills, falcons frighten scavenger birds and other small wildlife away from the refuse and at airports, the falcons are used to keep the runways clear of flocks of birds.
Step-by-step explanation:
a) In a complete paragraph form, it should be written as follows:
"Farmers have been trying to keep hungry birds out of their crops for centuries. The first scarecrow was invented for this reason. Small birds destroy thousands of dollars' worth of crops each year, and farmers are forced to fight back to protect their crops. Chemicals effectively ward off birds, but they are capable of harming the crops. Some farmers have even tried to scare the pesky birds with noise from cannon fire! Recently, however, a group of farmers tried something new. They brought in even bigger birds, falcons, to frighten the smaller birds away. Falcons are cheaper than chemicals, and less frightening than cannon fire. Falcons are birds of prey. When a smaller bird sees one, it flies away. Falcons are not only helpful in the fields, they are used in airports and landfills too. At landfills, falcons frighten scavenger birds and other small wildlife away from the refuse and at airports, the falcons are used to keep the runways clear of flocks of birds."
b) Grammatically, incomplete sentences are regarded as sentence fragments. Sentence fragments do not contain either the main verb or subject (or both). On the other hand, run-on sentences consist of at least two independent clauses that are connected in one sentence without proper punctuation.