What does the word that contains the stem most likely mean?

For Valentine’s Day, my boyfriend gave me a cordiform box of chocolates. In the heart, it was filled with slips of paper that told me what he loved about me.

Responses

a heart that is not strong; a weak heart
a heart that is not strong; a weak heart

a broken heart
; deep sadness
a broken heart ; deep sadness

a condition that causes a heart murmur or heart failure
a condition that causes a heart murmur or heart failure

shaped like a heart

shaped like a heart