Children's emotional development is a complex process influenced by various factors, including the environment they grow up in and the relationships they have with their parents. The cause of unreasonable emotional development in children can be attributed to excessive anxieties in parents, rejection by parents, and overprotection by parents. Let's explore each of these factors in detail:

a) Excessive anxieties in parents towards their children:
When parents have excessive anxieties or worries about their children's well-being, it can have a negative impact on the child's emotional development. Constantly expressing anxiety or overprotective behavior can prevent children from developing independence, resilience, and problem-solving skills. It can also lead to children feeling overwhelmed or incapable of handling challenges on their own.

b) Rejection of the children by their parents:
Rejection by parents can have a profound impact on a child's emotional development. When children experience rejection, whether it be through neglect, emotional or physical abuse, or lack of emotional support, it can lead to feelings of low self-esteem, worthlessness, and difficulty forming healthy relationships. This can hinder their ability to regulate emotions, express themselves, and develop a positive self-identity.

c) Overprotection of children given by the parents:
While it is natural for parents to want to protect their children from harm, excessive overprotection can hinder a child's emotional development. Overprotective parents may shield their children from experiencing normal challenges and setbacks, which are essential for developing resilience and problem-solving skills. It can also prevent children from learning how to manage their emotions and cope with stress effectively. Overprotected children may struggle with independence, decision-making, and developing a sense of self-efficacy.

d) All of the above:
The correct answer is option 'D' because all of the above factors contribute to the unreasonable emotional development of children. Excessive anxieties, rejection, and overprotection can individually or collectively hinder a child's emotional growth and well-being. It is important for parents to strike a balance between providing support and guidance while allowing their children to explore and learn from their own experiences. Creating a nurturing and secure environment that fosters emotional intelligence, self-esteem, and resilience is crucial for healthy emotional development in children.