Weed that is responsible for Asthma is

✅Explanation:
-Parthenium (Parthenium hysterophorus), also known as congress grass or carrot grass, is a weed that is known to be a significant trigger for asthma and allergies in humans. Its pollen grains are highly allergenic and can cause respiratory problems in sensitive individuals. Parthenium is an invasive weed that spreads rapidly and can affect agricultural fields, pastures, and urban areas.
– Parthenium is commonly known as ‘gajar ghas' or 'congress grass’.

✏️Parthenium:
-Parthenium or Gajar Ghans is the most common invasive species in India.
-Parthenium hysterophorus plant causes milk disease in livestock and also responsible for respiratory malfunction in humans.
-Contact with the plant causes dermatitis in cattle and domestic animals.
-The main substance responsible is Parthenium, which is dangerously toxic.
-Image: (from left to right) – Lantana, Xanthium, Parthenium

🔴Additional information::

✏️Cypress:
-It is a common name for various coniferous trees or shrubs of northern temperate regions. 

✏️Xanthium:
-It is a genus of flowering plants in the sunflower tribe within the daisy family.
-It is native to the Americas and eastern Asia.

✏️Lantana:
-​Perennial flowering plants in the verbena family.
-They are native to tropical regions of the Americas and Africa.

🔴 Related terminologies:
-Allergen: A substance that can cause an allergic reaction.
-Asthma: A respiratory condition marked by attacks of spasm in the bronchi of the lungs, causing difficulty in breathing.
-Invasive Weed: A non-native plant that spreads rapidly and aggressively, displacing native vegetation and causing ecological or economic harm.