Which of the following is an organ in the digestive system heart, stomach, intestinal tissue, lungs

Stomach

Explanation:

The heart and lungs aren't part of the digestive system and intestinal tissue is just tissue, not the organ

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.