What was it like 'living' in Trenches during World War One (WW1) What were conditions like, how did it effect soldiers physically/mentally?

The trenches were awful.

Explanation:

Trenches were long, narrow ditches dug into the ground where soldiers lived. They were very muddy, uncomfortable and the toilets overflowed. These conditions caused some soldiers to develop medical problems such as trench foot. PTSD was extremely common.

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.