vocabulary improvement techniques for banking railways one word every day

Superovulation and embryo transplantation techniques are being used for improving

On 14 January 2020, with which Indian bank did the South-Central Railway sign an MoU to implement door-step banking at 585 railway stations?

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement". They are giving something back to the planet that (being defiled) every day in a thousand ways.