Is a snake a consumer producer or decomposer?

A snake is considered a consumer and not as a producer nor decomposer. It is classified as a consumer because it eats other animals such as rabbits, mice, and even some insects when they are very young. The only organism that is considered as producers are those that are capable of producing their own food such as the plants. Decomposers are the fungi and bacteria. Hope this answer helps.

Fossil found in strata reveal that unused body part decrease in size

Idont know but good luck; )