Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.

Describe a scientific development that has benefited mankind.

You should say:

• What type of development it was
• Why it was needed
• How it has been used

And explain why this scientific development was so beneficial.