Please help me select which biology term fits in the blank best.

Part A.
Analysis of genome structure and function helps researchers understand how the products of genes _1_ interact during the _2_ of individuals of the species.

1. Either proteins, amino acids, or nucleic acids.
2. Either mutation, evolution, or development.

Part B.
Understanding the structure and function of the genomes of species helps researchers determine _________________________________.

Is the blank:
1. How to prevent genetic mutations
2. How species are related to each other
3. Why some species' traits don't change over time
4. Why some genes are passed on and others are not

Please help me!