Question

how ants enter into the tight fitted
jar​

Answer 1

$\huge\underline\orange{\mathcal Answer}$

Ants following a 'scent' path laid down to a food source. Wipe down the counter and as far back as you can see the ants on their path. Put the sugar container in an air tight 'zip' lock plastic bag.

$\huge\orange{Hope\:It\:Helps!!}$

Answer 2

$\huge{\underline{\underline{Answer}}}$

Start putting food in airtight plastic containers or mason jars, as their materials are too thick for ants to chew through and their airtight design won't allow food odors to escape and attract pests in the first place.