What is the main reason that the alternative explanations to evolution are not considered scientific?

The main reason that the alternative explanations are not taken into consideration is because they are not proved scientifically.

For the validation of any hypothesis it must be first proved by experiment using the scientific method.

The alternative might not have strong evidence so as to be proved scientifically so it is not considered as an explanation of evolution.

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

answer; the above answer to the above statement is (true)