Question

Why did Colin cover up the picture of his mom in the secret garden?
"The Secret Garden"

Answer 1

Answer: He covers it up for multiple reasons of his own.

Explanation: For one it brings him pain to think about his deceased mother just like it would hurt anyone else. For two he is mad at her for leaving him. He is like any kid who would have lost their mom some might be happy some are upset or some are just out right mad that their mother had to die.

Answer 2

There are two reason.

Colin tells Mary and shows that this is a portrait of his mother. He covers it up because 1. he thinks of his mother as his treasure and does not wish to share it with anyone else. Or 2. Mary is laughing and so Colin gets offended while he is unhappy.