A、Because they don’t know how to use their long legs. B、Because they are abandoned by their parents. C、Because they need to lear

Every day a keeper at Prague Zoo leads half a dozen baby flamingos on a walk through the grounds. Abandoned by their parents, these young wading birds still need help with some of the basics of growing up, including how to use their long legs.
"We raise the young pink flamingos ourselves because their parents don’t take care of them for reasons unknown to us," said Lenka Pastorcakova, a spokeswoman for Prague Zoo.
Prague Zoo has kept flamingos for 50 years but recently keepers began to notice that some parents were not looking after their newborn chicks.
Used to living in flocks, fledglings who are abandoned run the risk of not learning how to socialize and how to walk properly. The zoo is making sure to take the birds out in groups and let them test out different surfaces, including tarmac and grass.
The lessons seem to have paid off. While some of the birds are still cautious and tread gingerly along behind the zookeeper, others dash ahead confidently before wheeling back to rejoin the group.
Questions 1 and 2 are based on the news report you have just heard.
1. Why are the baby flamingos raised by keepers in Prague Zoo?
2. What do we know about Prague Zoo’s lessons for baby flamingos?