Explanation

“About” is used to indicate the subject learned.

“From” shows the source or teacher of that knowledge.

Correct sentence:

"He learnt about love and care from his mother."

Explanation

The word “as” is used to indicate the role or position someone holds.

Correct sentence:

"He worked as a day fruit commission agent."

Explanation

The correct phrase is “speak of”, meaning to mention or talk about something.

Correct sentence:

"I spoke of my foot."

Explanation

The word “like” is used to compare someone to another person.

Correct sentence:

"A clever girl like Mariam made such a mistake."

Explanation

The correct phrase is “in this regard”, meaning concerning or about this matter.

Correct sentence:

"We should take some steps in this regard."