Text: a parent can help dissipate the child's concern by getting her to use dolls to demonstrate what happened.

Correct capitalization: A parent can help dissipate the child's concern by getting her to use dolls to demonstrate what happened.

Text: bottles for beer and carbonised soft drinks in the deposit system are excluded, as they are reused in a closed system.

Correct capitalization: Bottles for beer and carbonised soft drinks in the deposit system are excluded, as they are reused in a closed system.

Text: these important combinatorial results were in the area of hall 's theorem, ramsey 's theorem, the rado selection principle, matroids and theory of transversals, and partitions.

Correct capitalization: These important combinatorial results were in the area of Hall 's theorem, Ramsey 's theorem, the Rado selection principle, matroids and theory of transversals, and partitions.

Text: thank you for visiting.

Correct capitalization:
Thank you for visiting.