Is a 20 year allowed to talk to a 13 year old??

It depends on context. For example if they're helping them with something, or they're a close friend/family member then sure. If they're talking to them online then no in my opinion.

Explanation:

I think no

Explanation:

because form 13 years we begin teen and 20 yesrs one start to do job where as 13 one still study! if you like it add me as friend or didn't don't add me as friend it's your wish

the effect is, the moon appears to change shape overtime

explanation:

(the answer is d)

hope this !