Heredity is
a. passing traits from one generation to the next
b. the likelihood that an individual will contract a disease
c. the optimal health a person can achieve
d. all of the above

The right option is; a. passing traits from one generation to the next  

Heredity is passing traits from one generation to the next.

Heredity is the passing on of physical and genetic traits from parents to their offspring. The offspring cells or organisms obtain the genetic traits from their parents through DNA (genetic material) and either through asexual reproduction or sexual reproduction. Common examples of heritable traits that can be transmitted from parents to their offspring include eye color, hair color and skin color.

b. read the phase at the intersection of any given temperature and pressure.

1) a

2)c

3)a

4)c

5)b

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