What are 2 base pairs?

the supermassive black hole is in the middle of the galaxy.

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.

and after water is usually warmed by the sun the water temperature raises and then evaporates .

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.