Which of these would be a concern about the use of biotechnology? a) increased crop yield
b) increased opportunities for jobs
c) making of new vaccines
d)creation of new pathogens (diseases)

Biotechnology is basically the use of biological methods for the welfare of mankind.

Explanation:

So, nearly all options are correct in a sense that biotechnology is used to increase crop yield e.g use of GMO plants

It can increase job opportunities

It's used for making of vaccines in a lot of areas people consider biotechnology is just for making vaccines so this is obvious function

Yes, biotechnology can be used for making new pathogens and can be used for bad purposes

It's called biological warfare where a country make pathogens and release it into another country but this is not used and is prohibited by global peace laws.

Explanation:

Hormone production and release are primarily controlled by negative feedback. In negative feedback systems, a stimulus causes the release of a substance whose effects then inhibit further release. In this way, the concentration of hormones in blood is maintained within a narrow range.