Question

if you want to give support to someone, you ___ them

Answer 1

This question seeks to bring out the fact that support can be used both as a noun and a verb.

When we say to give support , in this case support is a noun.

When we say for example:

I will support you.

Then in this case support is a verb.

The correct answer is thus :

If you give support to someone ,you support them.

Answer 2

The best fit word that will fit into the blank will be 'help'.

If you want to give support to someone, you help them.

The meaning of help means assisting or supporting someone.

There is no other word which can fit into the blank.

Also, help is a synonym word to support which is in the first phrase of the sentence.