Orcas, or killer whales, are natural predators of sea otters. it has been observed that in regions where the sea otters are not present, sea urchins grow rapidly and destroy much of the natural kelp vegetation.

which of these statements is correct in this context?
a) kelp is the keystone species because their survival is key to the survival of the entire ecosystem.
b) sea otters cannot be considered the keystone species because they are not the top predators in the ecosystem.
c) sea urchins are the keystone species because they multiply rapidly in the absence of their natural predators.
d) sea otters are a keystone species as they prevent a herbivorous species from completely destroying a plant species.

The answer is D sea otters are a keystone species

Explanation:

The removal of a keystone species could cause their natural prey to multiply and destroy the dominant vegetation of the ecosystem. Kelp is the foundation species in the ecosystem. Sea urchins consume the kelp. If the sea urchin numbers are not kept in check by the sea otters, they will rapidly multiply and destroy the kelp vegetation. Therefore, sea otters are a keystone species as they prevent the herbivorous species from completely destroying a plant species.

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.