You observe a tissue under the microscope and see intercalated discs between adjacent cells. which tissue are you observing

The correct answer is a muscle tissue, more precisely cardiac muscle tissue. Cardiac muscle tissue consists of individual cardiomyocytes (heart muscle cells) which are connected by intercalated discs to work as a single functional organ. The function of intercalated discs is to support synchronized contraction of cardiac muscle.

The formal one is the third one.

Explanation:

By taking journalism courses,one may be prepared for several excitinf careers.

Because when you're talking formaly you need to use some formal words and not like I love this and that or that job is awesome,because you need to show some respect.