In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.

Swarms of the desert locust, which invaded India via Pakistan in April, have made (1)________ way to at least five states, (2)________ a trail of destruction in their (3)________ . Desert locusts move in large groups, (4)________ swarms, and can eat crops up (5)________ their own weight every day. When millions of (6)________ descend on a crop, they destroy (7)________ . The desert locust is considered the (8)________ destructive migratory pest in the world (9)________ a single swarm covering one square kilometre can (10)________ up to 80 million locusts. As per eyewitnesses, the swarm which entered India from Pakistan was about two to three kilometres long.