The model that assumes that evolution proceeds with a slow successive change in a given evolutionary line are referred to
a. the sympatric model.
b. the allopatric model.
c. successive descent model.
d. gradualism.
e. punctuated equilibrium

The correct answer is - d.  gradualism.

Explanation:

Gradualism is a model of evolution that explains that the smaller variation in an individual organism that is occurring over a period of the time is to the betterment of the organism in their environment.

These changes or variations allow them to thrive and survive with a slow successive change in an evolutionary line or the whole population. It is a consistent process.

Thus, the correct answer is - D. gradualism.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

if you know your abc's you should be able to get your answer or just use google