Answer:
1. INVALID
(NOT ALL men are strong. No supported study to validate this claim)
2. VALID
(Constitution is the basic principles and laws of a nation that guarantees certain rights to the people within it. Reference: Merriam) And freedom of speech is one of our rights.
3. VALID
(The statement implies bias opinion but for me it is valid because the statement is right. If we do not care for our environment, climate change will pose a threat to our Mother Earth.)
4. INVALID
(No scientific study about this.)
5. INVALID
(NOT ALL teachers, jusq)
6. INVALID
(Only thousands died, not millions. Infrastructure damage was thousands though.)
7. VALID
(There is a statistical data meaning the statement came from a research study)
8. VALID**
(Yes, it's not specifically stated who the psychology experts are but for me it's valid because the statement, even if it seems biased, totoo pa din naman sya. We all know na ang pagtatanim ay nakakatanggal ng stress, diba? Kailangan naka detalye ang isang claim for it to be accepted. Hindi chismis ang isang VALID CLAIM, it is a FACT.)
9. INVALID
(Walang ganun, mars)
10. VALID**
("Study says" KEYWORD.)
Explanation:
A claim is valid if it is widely accepted, supported by statistics, research, and simply, not biased.
Happy learning :)
God bless.