The correct answers are:
1- Reflexive
The pronoun "themselves" here is refering to the subject: animals.
2- Intensive
Here, the word "themselves" seek to put emphasis on the fact that it is the animals who are being protected by the camouflage.
3- Reflexive
"Herself" in this sentence acts as a reflexive pronoun because the subject and the object (the mother polar bear) are the same.
4- Intensive
The word "itself" is used to stress that what blends with the snow is the bear's fur.
5- Reflexive
"Itself" here is a reflexive pronoun because it refers to the subject and functions as direct object.
