Butter is taken out by curd.

Butter is a dairy product that is made from milk. It is obtained by separating the fat from the milk. There are several methods that can be used to separate the fat from milk, such as sedimentation, decantation and filtration.

Sedimentation:
Sedimentation is the process of allowing solid particles to settle down at the bottom of a liquid. In the case of milk, when it is left undisturbed for some time, the fat present in the milk starts rising to the top. This is because fat is lighter than the other components of milk. The fat forms a layer on the surface, which is known as cream.

Decantation:
Decantation is the process of carefully pouring off the upper layer of a liquid while leaving the sediment or precipitate at the bottom. In the case of milk, once the cream has risen to the top, it can be separated by carefully pouring off the milk from the bottom, leaving the cream behind.

Filtration:
Filtration is the process of separating solid particles from a liquid by passing it through a filter. In the case of milk, a filter can be used to separate the cream from the milk. The milk can be poured through a cloth or a fine mesh sieve, which will allow the liquid to pass through while trapping the solid particles, including the fat.

Separation of Substances:
The process of obtaining butter from milk involves the separation of substances. Milk is a mixture of various components, including water, fat, protein, and minerals. By using sedimentation, decantation, and filtration, the fat present in milk can be separated and obtained as butter.

Curd:
Once the cream is separated from the milk, it can be churned to obtain butter. Churning is the process of agitating the cream until the fat globules in the cream come together to form butter. This can be done by whisking the cream vigorously or using a mechanical churner.

Conclusion:
In conclusion, butter is taken out by curd. The process involves separating the fat from milk through sedimentation, decantation, and filtration. Once the cream is separated, it is churned to obtain butter.