Why do animals remain in groups? What are the advantages? Are there any disadvantages?Make two lists.

Advantages:

* Smaller animals have a smaller chance of getting eaten by a predator.

* Some animals gang up to attack a bigger predator.

* They can find more food if they work together.

             Disadvantages:

* Large groups of animals are more visible to predators.

* Increased vulnerability to predators.

Explanation:

Hope that helped :)

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active voice: my father cut the tree.

passive voice: the tree was cut by my father.

active voice: people buy newspapers every day.

passive voice: newspapers are bought (by people) every day.

active voice: people have been using movies as political propaganda since world war ii.

passive voice: movies have been used as political propaganda since world war ii.

active voice: donna gave me my birthday present.

passive voice: i was given my birthday present (by donna). / my birthday present was given to me (by donna).

active voice: mom will leave the keys on the counter.

passive voice: the keys will be left (by mom) on the counter.

the words in parentheses are the agent of the passive voice and can be omitted when obvious, generic, or simply unnecessary.