Enzymes are part of the digestion process. their function is to break down . amylase is a digestive enzyme secreted and is responsible for breaking down

Sugar and complex carbohydrates

Explanation:

The first digestive enzyme is encountered in the saliva of human beings. This enzyme is known as amylase. As a part of “process of chemical digestion of food”, digestion of simple sugars carried by salivary amylase in mouth is the first step.

Amylase breaks down complex sugars i.e carbohydrates into simple sugars by disrupting the chemical bonds between the saccharides molecules and thus converts it into simple forms.  

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

the correct answer is 2 and 4