In understanding the trait of shyness, a behavioral geneticist will argue that:
1. genetics will determine

two levels of shyness and environmental factors will determine which one actually occurs.
2. the influence of genetics on shyness is fixed.

3. identical twins separated at birth will always have the same level of shyness.

4. genetics set a range for the level of shyness and environmental influences will interact with that range.

4. genetics set a range for the level of shyness and environmental influences will interact with that range.

Explanation:

4. genetics set a range for the level of shyness and environmental influences will interact with that range.

Environmental changes determine to which range certain traits work. e.g the eggs hatch but only when certain heat is provided to them. similarly genetics work in all behaviuors but it shows when conditions are most favourable.

Every child is  born with an ability to learn but only those learn who are given the environment to do so.

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.