Cause and effect relationships are studied by _____

Change the given sentence into passive voice.

Why does he waste his time on trifles?

Find the correctly spelt word.

With reference to the passage, the following assumptions have been made

I. The dogs protect their owners

II. The dogs fear the strangers

Two children were shot dead by a psychopath during the California music festival.

Change the given sentence from Active Voice to Passive Voice.

The batsman hit the ball for a six.

Change the given statement into passive voice.

Follow me.

Select the correct passive form of the given sentence.

Manu will tell her later.

Select the correct active form of the given sentence. 

Let this email be sent immediately.

Who can help me with Mathematics?

In the given questions, choose one correct option that describes the sentence in the most suitable manner.