First one is wrong, second one sounds good. Sigue así!
Soy (yo form, present tense) - use when describing traits about yourself (permanent traits, not thoughts/feelings/locations/etc)
Era (yo/el/ella/usted form, past tense) - directly translates to 'was.' use when describing something in the past
Answer:
1. tienen
2. tiene
3. estas
4. Esta
5. tenemos
Explanation:
Just dont forget the accents. My keyboard doesnt have them.
Comprenden (your last choice)
