Answer:
B
Explanation:
for·mi·da·ble
/ˈfôrmədəb(ə)l,fərˈmidəb(ə)l/
Learn to pronounce
adjective
inspiring fear or respect through being impressively large, powerful, intense, or capable.
"a formidable opponent"
Internal. Which means "problems in the inside" as with themselves. For example, many people face depression, anxiety, paranoia----just to name a few. All of those are MENTAL illness that people have to battle with daily. External conflict/ battles, are with actual people.. something we can see. External means "outside". Hope I helped!
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