When traits are COMBINED together and each are expressed.

This is called CODOMINANCE

Explanation:

Codominance is an inheritance pattern that does not conform to Mendel's principle of inheritance i.e. non-mendelian inheritance. Codominance is the process whereby two alleles of a gene are both dominant for their respective traits and hence are simultaneously expressed when in a combined or heterozygous state.

An example is the ABO blood group system in humans. Alleles for A and B are codominant, meaning that, the two traits will be expressed when the two alleles are combined to form AB. Hence, according to this question, when traits are COMBINED together and each are expressed, it is called CODOMINANCE.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.