If you are uncomfortable talking to your partner about your personal limits
a. it is a good sign because if you don't talk about sex, you won't do it.
b. it is a good sign because it shows that you are in a normal teen relationship.
c. it is a bad sign because you can't know your limits before you are in the situation.
d. it is a bad sign because it shows that you are not in a healthy, mature relationship.

D. It is a bad sign because it shows that you are not in a healthy, mature relationship.

Explanation:

Showing personal limits in the relationship is an important part of any relationship, because it shows that you trust your partner and that you are living in a happy and healthy relationship, to the point of being able to express your limits and your wishes. You should feel comfortable, honestly communicating your needs to your partner without being afraid of their reaction. Talking about your limits with your partner is a great way to ensure that everyone's needs are being met and that you feel secure in your relationship.

In summary, we can say that if you do not feel comfortable talking about your limits with your partner, this is a bad sign because it shows that you are not in a healthy and mature relationship.

b) the heart is a pump made of muscle and that is difficult to grow in the lab.